Malicious PDF — malware analysis report

Static analysis result for SHA-256 450300a171aa8032…

MALICIOUS

PDF

49.6 KB Created: 2020-12-26 23:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20dba92235fc62c6ac2048ec0a920676 SHA-1: 18bff74274a0b550c744bbf925f70f725087d12e SHA-256: 450300a171aa80329ba7cbfc94ded7f1d6df12bfdadc5e09512e4221965ea6d3
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7323

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/strik?utm_term=toilet+treasures+explore+your+toilet+tank
    • https://pufabakorulur.weebly.com/uploads/1/3/4/3/134320636/5530293.pdf
    • https://gabofulonu.weebly.com/uploads/1/3/4/7/134730366/5f845bebe7d18.pdf
    • https://wagizubim.weebly.com/uploads/1/3/4/4/134470033/sujudasaxorerukiza.pdf
    • https://pevopuxavinedun.weebly.com/uploads/1/3/1/4/131406680/gesoxuxilixitu.pdf
    • https://cdn.sqhk.co/nezusoxe/rggjghd/58291171577.pdf
    • https://static.s123-cdn-static.com/uploads/4380531/normal_5fdfefe8b2ced.pdf
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/0171b406964815c.pdf
    • https://molawaxurot.weebly.com/uploads/1/3/4/6/134699933/momozetemeno_dipubewif.pdf
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/2529138.pdf
    • https://cdn.sqhk.co/ditetona/jfPhieA/super_jabber_jump_4-_20.pdf
    • https://s3.amazonaws.com/marimejerebo/artin_a_dermenjian.pdf
    • https://s3.amazonaws.com/dewutexorob/26192604017.pdf

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