Malicious PDF — malware analysis report

Static analysis result for SHA-256 0415b69da79f0e2b…

MALICIOUS

PDF

116.5 KB Created: 2021-06-21 01:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 40dd7183ad68214f48f54627d81826b6 SHA-1: a5b348df96256cde651089f1a8e25f1e6ddc6a40 SHA-256: 0415b69da79f0e2bd91d5df8dd4466b0052a01ed313f17cf6aa25d65a43bd084
164 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a high number of links pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content. The presence of a 'download' button heuristic further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 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://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/bf4a461b66943736ecbc9195f7ef2b3a/pawawa.pdf In PDF document text
    • http://allmedicus.com/userfiles/file/78788857564.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/32e8b49b0140be555f1185044b476351/zipogap.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/63263897599.pdfIn PDF document text
    • http://abnicum.com/files/file/xivibotom.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/70e20e90b62f2f0274fe4dffe3163368/dajolik.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/aac6582a2615c4db8074ad87b0c55e6c/ziwajiv.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/35f2d767e9d9149f7bc9f2febe1673b5/11081287254.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/cf1af59d429875631af92390f3965c5b/pisezuluvaxewefefa.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210603_024359.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5da28ae9b---libiwubaxo.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/59009443718.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a1baa232a9f---moginepubufekewe.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/igftom3us3tm6om1cff2447a8d/boditeguwuwoj.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/71219419553.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=bengali+kobita+imagePDF link annotation
    • 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E8B 4984 bytes
SHA-256: 8ed55971973b2082978d5dbf32d7e9bb321a28d59e2cc203685c9b30a65c4866
font_01_sfnt_off00014f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F76 22288 bytes
SHA-256: 7371c9d014f9f588f76a068a384afd2f8ad214af1d563f96e40ed2b74b2eca06
font_02_sfnt_off00018b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B59 10280 bytes
SHA-256: 6d74484c09bd12843f1d79608dad27089cb801950f427ecb5c79f330c52d2396
font_03_sfnt_off0001ae66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE66 16068 bytes
SHA-256: 3b1167557c0500c78008053c404847a906c4d495ef15adec583fc97e76626070