Malicious PDF — malware analysis report

Static analysis result for SHA-256 e961829f68a46894…

MALICIOUS

PDF

91.2 KB Created: 2020-11-25 23:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1e69c6d9a2e7b6ba87350f2a71d195f SHA-1: d4bf0cc55ed5ef8d7687b4548a7d577257bd89a1 SHA-256: e961829f68a4689494ad82e3c88ae160fcaaaccb3c454974d3fece536b06b177
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffmen.ru'. This URL is likely used to lure victims to a malicious site. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan. No scripts were extracted, but the presence of a malicious URL is sufficient to infer a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://traffmen.ru/strik?utm_term=overhead+transparency+master+chapter+14
    • https://cdn-cms.f-static.net/uploads/4379236/normal_5f8f235a74809.pdf
    • https://cdn-cms.f-static.net/uploads/4427094/normal_5fa1f39a9e1a2.pdf
    • https://cdn-cms.f-static.net/uploads/4421983/normal_5fb7b150aa680.pdf
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f9b263f5573f.pdf
    • https://cdn-cms.f-static.net/uploads/4406501/normal_5fbb3a0c2387c.pdf
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f885e21c2611.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xovajukoxin/crystal_reports_old_version.pdf
    • https://s3.amazonaws.com/tubupejevomo/xibobebatixa.pdf
    • https://uploads.strikinglycdn.com/files/5879bf2d-c9ae-417e-944a-fff3021ac467/libro_quimica_inorganica_housecroft.pdf
    • https://uploads.strikinglycdn.com/files/f5af26d4-dd19-423a-87f8-e9f929c9cae8/50534306297.pdf
    • https://uploads.strikinglycdn.com/files/9dc8a787-f772-43d9-af22-4ad0e5cfb521/sefebonudito.pdf
    • https://s3.amazonaws.com/fasanag/19957986024.pdf
    • https://s3.amazonaws.com/lonozote/rupeseretelikugi.pdf
    • https://uploads.strikinglycdn.com/files/692fce28-5f9c-48e6-a1a4-310ec9e5cd5e/wejijakaka.pdf
    • https://s3.amazonaws.com/rebomedug/hp_photosmart_7525_printer_user_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012837.bin
e162ad3f556115c7d924a1cf2f4458f30f08ad57e734b4d7df8667ded4de7879
pdf-font-stream PDF embedded font (sfnt) at offset 0x12837 5612 bytes
font_01_sfnt_off00013b35.bin
905e3981b88ea82b31118b0f3341ec4e5fca70d7490c773becb3af5bd807b79e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B35 10624 bytes