Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bfb2ec4b4cc85de…

MALICIOUS

PDF

54.1 KB Created: 2021-01-13 08:18:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 85dfb3be7acb212ac9bdca918e8d941e SHA-1: dc73868dc5552ce54e301d4386ab73ac7675bce1 SHA-256: 5bfb2ec4b4cc85de354271e0fe0096800b823c5ccc075ce8a95a622a900003e8
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The file's structure suggests it functions as a link farm, likely intended to direct users to phishing sites or download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7874

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
  • 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 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://traffine.ru/wb?keyword=rally%20legends%20rc%20uk In PDF document text
    • https://jizufolikoni.weebly.com/uploads/1/3/4/3/134349493/049800d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401972/normal_5fc7d3234113a.pdfIn PDF document text
    • https://site-1174749.mozfiles.com/files/1174749/kemunofapesiposakerakiko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493888/normal_5fe9c1d3b16fa.pdfIn PDF document text
    • https://site-1177446.mozfiles.com/files/1177446/best_soap_ingredients_for_sensitive_skin.pdfIn PDF document text
    • https://site-1176551.mozfiles.com/files/1176551/hearts_of_palm_ceviche_tostadas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461746/normal_5ffe2538af14b.pdfIn PDF document text
    • https://site-1166067.mozfiles.com/files/1166067/mobile_passport_control_jfk.pdfIn PDF document text
    • https://site-1177600.mozfiles.com/files/1177600/epo_guidelines_for_examination_intermediate_generalisation.pdfIn PDF document text
    • https://site-1172364.mozfiles.com/files/1172364/hangouts_app_download_free.pdfIn PDF document text

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