Malicious PDF — malware analysis report

Static analysis result for SHA-256 580eee0bb5544b0f…

MALICIOUS

PDF

124.1 KB Created: 2021-01-10 10:42:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8d6196454e611c2be028694994d86bff SHA-1: 772c8089a40854ed1a11b3d30402914b199ff517 SHA-256: 580eee0bb5544b0ffbac4b15b299fb309a8f55bd7775ca001766e3512639cf00
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://gettraff.ru/123?utm_term=difference+of+constant+and+control+group'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier and ClamAV detection further support the malicious nature of the file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/123?utm_term=difference+of+constant+and+control+group In PDF document text
    • https://cdn.sqhk.co/pumibavi/OicTibj/61204243695.pdfIn PDF document text
    • https://site-1177840.mozfiles.com/files/1177840/brain_dots_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/whb9fib/kung_fury_street_rage_ps4.pdfIn PDF document text
    • https://site-1177370.mozfiles.com/files/1177370/kudosevekadu.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/jJjbjbI/tejufadevul.pdfIn PDF document text
    • https://site-1177496.mozfiles.com/files/1177496/red_sunset_park.pdfIn PDF document text
    • https://site-1168337.mozfiles.com/files/1168337/72477220902.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/L3v9ahi/5071701927.pdfIn PDF document text
    • https://site-1168003.mozfiles.com/files/1168003/73193960512.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/wixanarer/27753616290.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/quality_assurance_files.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/jotazevuxofuvawiragetoja.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/yamhill_county_transit_routes.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_off0001a8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8DF 5320 bytes
SHA-256: fc99a7f1bdad266d15d9b232010f9518e6ea82be8e9abaaee9d51758621a903f
font_01_sfnt_off0001bb12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB12 12148 bytes
SHA-256: 06d1c1ce1205321e2629e19355dc5f14cf105560e9fc266f513c6e0c78c50fa3

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