Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c4b4c1c6d181ef2…

MALICIOUS

PDF

67.7 KB Created: 2020-12-19 01:45:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 05fb248831be137a71a5e3dff54c6509 SHA-1: 4d6590cae9f8024accf99c2afc05ae43d87fd1a2 SHA-256: 9c4b4c1c6d181ef236421c2a83f5dd8d45cc4ff97601ba53abc6ca8ad40e5f6a
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 'https://traffking.ru/strik?utm_term=30+amp+manual+transfer+switch'. This URL is likely used to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to '30 amp manual transfer switch', suggesting a lure to entice clicks on the malicious link. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • 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://traffking.ru/strik?utm_term=30+amp+manual+transfer+switch In PDF document text
    • https://diwijavel.weebly.com/uploads/1/3/4/6/134691177/rapijizetujuz_gosigosudid.pdfIn PDF document text
    • https://faturigazed.weebly.com/uploads/1/3/4/8/134859690/vuvufuno-jeximiwigos-terapow-pasepoju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466661/normal_5fd884b8119dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381759/normal_5fcce88ccc7e5.pdfIn PDF document text
    • https://popibixa.weebly.com/uploads/1/3/4/7/134745137/vuriwadakesugoruk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xidazeze/wesosumagudifowerav.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/action_crack_mega.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/44212966613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d7b4d5-afc6-4620-ad4f-d30a9f85dc7a/you_feel_vibrations_from_deep_below_terraria.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB5B 5556 bytes
SHA-256: ea0f1683510777f5e20340b4abe77b0d01bc8d9b66aa9b1de33a180d6cbb8615
font_01_sfnt_off0000de2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2A 10640 bytes
SHA-256: 929f3b5218d456e16cfa55f0786f4367ce7314a0883e03ec6f72a11e0a929df7