Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb3be5c20333dc08…

MALICIOUS

PDF

105.4 KB Created: 2021-07-20 19:35:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4e5f5da243e6bf8d1b4bf93da17eab3f SHA-1: 91916a1a7722470cf293d99d3520e3fb6200a1c0 SHA-256: eb3be5c20333dc08f1ec21f14ac27eccc751e4051c4ca834f5a6369c1e790f59
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, embedding numerous URLs that point to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

Heuristics 6

  • 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.
  • 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 http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac426740d61---91467092057.pdf In PDF document text
    • http://honda-vo.com/upload/file/gutilopafesabebamobefobu.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/93734020271.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/e1baf9c60209373654b28c523a8d2eb5/dudas.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/ideml9mdtmds91i77qn7fvvd13/xopabusapo.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/76187750049.pdfIn PDF document text
    • http://drive4smilesontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/jufono.pdfIn PDF document text
    • https://gamasteel.net/userfiles/file/nadaxuxofipetuwo.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a18ea2bbf335bc6b60fb90229de30ebd/88119053963.pdfIn PDF document text
    • https://heyratacademy.ir/file/xusikumemokunoje.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/54466739187.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16089136dee6a6---22985411622.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/35375583768.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a023e48a8e---wosalabobaloxabivod.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dbea6fc3fe6---23546157303.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/rirutixajoxinifuko.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16070d4b3c246c---xijizozelixawoko.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/gojulawozodipipojidipafok.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/956d1b256b3de9f7fe52bed159580428/labasiv.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/katularomofomajad.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/90322409032.pdfIn PDF document text
    • https://matfplayer.com/calisma2/files/uploads/51866190246.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e47df3a2788---fedirapoxanamopewibevabu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=the+meaning+of+disastrousPDF 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://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_off00013bae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13BAE 18328 bytes
SHA-256: d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
font_00_sfnt_off0000fbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC4 26560 bytes
SHA-256: 254b7c574fb8bb4b8068665bc3a4df24ba84e20775a21e4892e77df7820772fb
font_02_sfnt_off0001594f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1594F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001715c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1715C 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_04_sfnt_off00017edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EDC 10816 bytes
SHA-256: 9d1df3735e84f64c3cc7b388aa15843c8a77ed76698ccf2b8b48296a79b70fb0

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