Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce3422e6415f06b…

MALICIOUS

PDF

50.6 KB Created: 2021-01-09 17:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 280fe392f6a3ca7627e086f31f17634f SHA-1: b050c4d73ca7c88be8c0c10b0733ebb02eda2002 SHA-256: 6ce3422e6415f06b5cb2f54c0b9f06214e55cb838b32f5e09c88e1af678aefb7
262 Risk Score

Malware Insights

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

The PDF document is identified as a phishing lure, likely using an image-based approach to hide malicious links. It contains numerous links to external sites, with at least one identified as a malicious redirector. The ClamAV detection and ML classifier further support its malicious nature, indicating it's designed to lead users to harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5627

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 50 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=column+graph+excel+template
    • https://gumarifubora.weebly.com/uploads/1/3/4/4/134465571/4959846.pdf
    • https://cdn-cms.f-static.net/uploads/4416664/normal_5f951eff2fbfd.pdf
    • https://vewagabijepafin.weebly.com/uploads/1/3/5/3/135348553/fcc1e9b9e.pdf
    • https://xososikanezav.weebly.com/uploads/1/3/4/8/134892973/kepuma-daduroxejemilev-jixofagubakob.pdf
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/56dbabf175.pdf
    • https://cdn.sqhk.co/xuxiropuwomo/Itjibji/jetegotodor.pdf
    • https://tekoriforeta.weebly.com/uploads/1/3/4/6/134639422/tibiliposu_vexajipom_guvobiwinori.pdf
    • https://s3.amazonaws.com/numunenoji/aium_guidelines_biophysical_profile.pdf
    • https://s3.amazonaws.com/wibedubosateg/navisazigewama.pdf

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