Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd593728141b04f…

MALICIOUS

PDF

147.0 KB Created: 2021-06-26 00:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d40d7bffa0c4962cd1088849b9fad2ed SHA-1: c48b39838a011f8733a673c08f1ab6753d7eb5ae SHA-256: 5dd593728141b04f1c6439b3eb4bec2069ca57bc52acb5591ec60e20bc2d2240
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document exhibits multiple high-risk heuristics, including ML classification and ClamAV detection as a phishing trojan. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The presence of a 'remote support tool lure' combined with links to download files indicates an attempt to trick the user into installing malicious software or granting remote access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9410

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://laborke.ru/uplcv?utm_term=s4u+make+face+extension+free+download PDF link annotation
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/20a91394f5315446224bb01b5f1721da/51878038129.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072a54c3d878---dereravopoxox.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/o38n0efe14frg00cuqrofkbui0/88386615291.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/kazuzukupi.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/56fe5e15f9d068f256d142deb00064d4/35880561284.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/giminiruwoxegawot.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8aedf0fb3---58286642967.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b46060138c---48632708046.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/d67605140559f3533cfcb8b94b05ba9e/79895954278.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/c0ca2cc2bb72a1e19d3224332e39edaf/7281665852.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/7655e8ea36e375db2d9330cb2f36f9eb/97897388928.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/67562068854.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607056bd20ddd---mitizavunox.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4dc1efd64---48994383264.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc467073034---rusudiruvujebupinegire.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5f23ef776---85625799974.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086e145954fb---basib.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/78076844788.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609c74b59bb91---93013343812.pdfIn PDF document text
    • https://ambulatorioveterinariosismondi.eu/file/43884478867.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/bed3ca5209f2c4aa42f47c32ec85efb3/porobazisu.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/7b38db2edeb1b1b43db1ebedb70e4bc5/viwawavebotilelofasuse.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000197f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x197F9 25160 bytes
SHA-256: 95ec073a97878cf0c0f4351374790756540cdfbf2854d8801e0b27480ead0d0a
font_00_sfnt_off00015a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A0D 26772 bytes
SHA-256: 58128a001bb19fb04a4d5114a46cf070e712841e242f2f077b4919870d74d0b2
font_02_sfnt_off0001c438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C438 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001dc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC4F 11168 bytes
SHA-256: 1335511a7e6cf9ac9b537faf689ee8dd0645a0d92523e67d3839845e96e1df8e
font_04_sfnt_off0001f683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F683 24388 bytes
SHA-256: 3da228f51258ccbbd520d60e27b7d5d5886feb0e35e8c45c92b6f90474e18bdd

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