Malicious PDF — malware analysis report

Static analysis result for SHA-256 2efea55e98f80529…

MALICIOUS

PDF

58.6 KB Created: 2021-04-28 06:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5b8f2a83f6be101023ee8f4634fd868e SHA-1: dd0365fd7010b8153d797100d5c94a3068a98fb1 SHA-256: 2efea55e98f805293918c59278a17a30f3ca406f3ee4f4fc91e0a113294d2510
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier indicate malicious intent, likely to redirect users to malicious sites for credential harvesting or malware delivery. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7248

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/strik?utm_term=fundamentals+of+microelectronics+behzad+razavi+2nd+edition+solution PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422645/normal_6062409eb074b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388271/normal_60637d155edb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467564/normal_601af267843fa.pdfIn PDF document text
    • https://fozogefijegajor.weebly.com/uploads/1/3/1/4/131453134/2785aab8b2ba44b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_602c9b42e3ac5.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/fCpjdjd/33248924515.pdfIn PDF document text
    • https://cdn.sqhk.co/gubogezemazo/HYhhPhc/11972707853.pdfIn PDF document text
    • https://cdn.sqhk.co/leporolino/epj0y5V/55400505318.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379969/normal_60071af83b8c5.pdfIn PDF document text
    • https://futokiwusilo.weebly.com/uploads/1/3/4/4/134458686/6ccd6.pdfIn PDF document text
    • https://jinepesel.weebly.com/uploads/1/3/5/3/135346763/4441985.pdfIn PDF document text
    • https://jevixivuxed.weebly.com/uploads/1/3/4/6/134622771/juvolajipakar.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/587991.pdfIn PDF document text
    • https://fejilexa.weebly.com/uploads/1/3/1/1/131163980/9b6fe89819.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/Dgft7hf/zombie_frontier_3_sniper_fps_mod_apk_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5fe7f472761f1.pdfIn PDF document text
    • https://lenagalazipanom.weebly.com/uploads/1/3/5/3/135310064/sojitivazixumot_setaresis.pdfIn PDF document text
    • https://vezitiratad.weebly.com/uploads/1/3/1/8/131856143/bff3bd9.pdfIn PDF document text
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/8521327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489050/normal_603a22a6d9747.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451047/normal_5fd0912898d64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_6052a8836adc7.pdfIn PDF document text
    • https://movadopudi.weebly.com/uploads/1/3/0/9/130969115/mosiwu.pdfIn PDF document text
    • https://fopulowaledini.weebly.com/uploads/1/3/1/6/131637921/fejunuzurive_wugowafu.pdfIn PDF document text
    • https://molesomux.weebly.com/uploads/1/3/2/6/132681378/1242705.pdfIn PDF document text

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