Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd34cfa9857a15b7…

MALICIOUS

PDF

57.2 KB Created: 2021-04-01 21:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e43d7c7f48858a8a4b58ff55f18aa770 SHA-1: 95549fe55bf00e1ec8068dc6f4c22203d6944b84 SHA-256: bd34cfa9857a15b7402e32f61b86aa0576b283541161282e002c324bc4251cc1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external links, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the presence of numerous URLs suggests the document's primary purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9553

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://ponafet.ru/award?keyword=acca+f8+notes+pdf
    • http://dokojekiferej.mygamesonline.org/nostalgia_soft_serve_ice_cream_maker_instructions.pdf
    • https://static.s123-cdn-static.com/uploads/4497372/normal_6009553264c49.pdf
    • https://ferutijuze.weebly.com/uploads/1/3/1/8/131856408/gagago_timimagedo_tusipatikesim_jajaziw.pdf
    • http://tujukesabegakom.mygamesonline.org/kotepiwafalere.pdf
    • https://bosaralox.weebly.com/uploads/1/3/4/6/134608385/zojemitapej.pdf
    • http://fajasated.mywebcommunity.org/vocabulary_games_and_activities_peter_watcyn_jones.pdf
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5fd7a5b60fe8b.pdf
    • http://i-men.ru/83511150184p7kb7.pdf
    • http://afracheat8.xyz/captive_gendersmyewm.pdf
    • http://dokojekiferej.mygamesonline.org/how_to_mix_colours_to_make_black.pdf
    • http://kaxiwemusemoj.mypressonline.com/sociological_imagination_essay.pdf
    • http://lunatan.medianewsonline.com/lisejaxiduroxefana.pdf
    • https://povebosi.weebly.com/uploads/1/3/5/3/135346093/f672c62c.pdf
    • https://borobufa.weebly.com/uploads/1/3/1/4/131406827/lomizat-nuzaxaxogifode.pdf
    • http://kugukokoner.myartsonline.com/fumofekogezupuwa.pdf
    • https://uploads.strikinglycdn.com/files/bebe4ccf-c7ff-4595-bba7-d0eb23a10419/how_to_study_for_navy_advancement_exam.pdf
    • https://uploads.strikinglycdn.com/files/eac9b486-0218-403e-abac-8cf355ec0551/vudugilatewefijagimujag.pdf
    • http://zavulelobawabi.onlinewebshop.net/84695151031.pdf
    • http://lufevexos.atwebpages.com/15952411845.pdf
    • https://uploads.strikinglycdn.com/files/6138b91b-68b3-41c1-8bce-f1c6ec576c74/woratasofagotizolu.pdf

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