Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd0c1cdbece20f7…

MALICIOUS

PDF

85.6 KB Created: 2021-04-18 11:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7970b4568771f8fc60b875e445f74246 SHA-1: cf871e2670b6f1efc1ab6316ce6845b889a9ae84 SHA-256: 0bd0c1cdbece20f75c56161c4892b1adeea4d1790293ccd4919a7dd86baa355b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is detected as malicious by ML classifiers and ClamAV, and contains numerous embedded URLs pointing to disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed to redirect users, likely to a malicious payload. The presence of external URIs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9627

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://resalured.ru/strik?utm_term=panasonic+kx-dt343+instruction+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4506200/normal_5fd103e371ed5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_600d4fbc43dea.pdfIn PDF document text
    • http://rakuxijewimafud.22web.org/sajimikotawejekisogifol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457008/normal_603635d75d753.pdfIn PDF document text
    • http://dezirutumevolu.iblogger.org/process_approach_to_management.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459341/normal_5fffb95931efb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413013/normal_6061a0648fdb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459175/normal_5fe0d95d9441c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459174/normal_5feaf2bce8d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475391/normal_60222f4342d8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379387/normal_5fdf12bb7080e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414332/normal_5fd7981280e80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_60176b0665adf.pdfIn PDF document text
    • http://bedebatosisazov.22web.org/99276336610.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dijazulebok.epizy.com/zenifamuje.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/rivije.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/99526157303.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/woviruxa.pdfIn PDF document text
    • http://wekotegilufa.epizy.com/97963963610.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14855 5268 bytes
SHA-256: 3e62c6332e509e61abdee9ac2a2fbd4ea4e865a8a18571ccdf3a0a80dbe805e5

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