Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc8728d5ae6a535…

MALICIOUS

PDF

42.1 KB Created: 2020-11-22 00:23:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 722f170e0d72be233158301eb047a1e7 SHA-1: 5a4be88735800420dff1c13d8f7231df928d85f8 SHA-256: 0fc8728d5ae6a5352f23231af61360d64806c1b24769be29d90a3c43b7faf6da
184 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification also flagged it as malicious. The embedded URLs likely serve as a distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9297

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://trafficel.ru/aws?utm_term=south+kolkata+puja+guide PDF link annotation
    • https://vimikipemaw.weebly.com/uploads/1/3/4/3/134331773/2594efa50ff.pdfIn PDF document text
    • https://joguxakiwemov.weebly.com/uploads/1/3/4/7/134707067/53fb084a2174af1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f874f80c5338.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408862/normal_5fb3f818bbe8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447280/normal_5fb493c42a1b1.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/17ed08f24c2.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/1429013.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/demizagoxum_gowetofuper_rigif_nizidixaxojaxof.pdfIn PDF document text
    • https://kimuximufa.weebly.com/uploads/1/3/4/1/134132687/nepevovenamik.pdfIn PDF document text
    • https://posolefuriw.weebly.com/uploads/1/3/4/3/134374222/988260.pdfIn PDF document text
    • https://vusiwofadenu.weebly.com/uploads/1/3/4/2/134265349/vuxam_sumobabut.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/squirrelflight_and_leafpool.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/14057814826.pdfIn PDF document text

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