Malicious PDF — malware analysis report

Static analysis result for SHA-256 536fb6650a572b08…

MALICIOUS

PDF

50.6 KB Created: 2021-01-13 01:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c21381e9c194d937ec68752699c2392d SHA-1: 319d0a73033e2ce389edcab275c179298c16db80 SHA-256: 536fb6650a572b08ad795286140ebc3e3432f1a05bfac710a3efd31e4de9ba39
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains numerous embedded URLs pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The presence of 'wkhtmltopdf' in the metadata and the structure of the document suggest it may be used to host phishing pages or distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9443

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://trafftec.ru/aws?utm_term=eclipsing+binary+simulator+answers
    • https://cdn.sqhk.co/kifavubivelo/icoidie/dosewe.pdf
    • https://cdn-cms.f-static.net/uploads/4462992/normal_5fb29d5c9a370.pdf
    • https://static.s123-cdn-static.com/uploads/4446649/normal_5fc5513b6d978.pdf
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/zojivekexupupu.pdf
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/denezenekug-ludafire-rofiza-dumamepav.pdf
    • https://cdn-cms.f-static.net/uploads/4473056/normal_5fc180e57f54b.pdf
    • https://static.s123-cdn-static.com/uploads/4403541/normal_5fe02ddedb8ed.pdf
    • https://jifosibupegexuv.weebly.com/uploads/1/3/4/6/134692258/2868534.pdf
    • https://cdn.sqhk.co/puvegipuros/fhdphdY/84247573031.pdf
    • https://cdn-cms.f-static.net/uploads/4376875/normal_5f8d41f719d60.pdf
    • https://berajuvexoru.weebly.com/uploads/1/3/1/8/131860787/7911747.pdf
    • https://lugemubijovige.weebly.com/uploads/1/3/4/8/134879604/6413965.pdf
    • https://cdn-cms.f-static.net/uploads/4379046/normal_5f9564ae7c8ac.pdf
    • https://dusomekekonipa.weebly.com/uploads/1/3/4/5/134580960/4eb662e.pdf
    • https://cdn-cms.f-static.net/uploads/4490377/normal_5fb8d396b7956.pdf

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