Malicious PDF — malware analysis report

Static analysis result for SHA-256 760f7d4316b4f709…

MALICIOUS

PDF

69.5 KB Created: 2021-01-26 06:12:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 31e2c2a861ae2f4985ad1d11ed4eff9b SHA-1: a1fdedac6cde555c033ec8745536e383f3798eed SHA-256: 760f7d4316b4f70941bf20c705fe0a098b438a142f457fad1110c1afa653d178
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious. The primary attack pattern observed is the use of these links to likely deliver a phishing lure or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/wb?keyword=100hitz%2090 In PDF document text
    • http://iranomics.com/sapekebezasapojepanqft0o.pdfIn PDF document text
    • https://cdn.sqhk.co/firumefetev/jeigcgH/extinction_rebellion_red_brigade_portland.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/hbpijha/gelutolixujamofidobobuzoj.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/Ghehbjd/formula_acceleration_1_car.pdfIn PDF document text
    • http://rawenspant.online/dejobaqwoxj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416810/normal_5ffe88e21163d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468289/normal_5fe3fc3d06d91.pdfIn PDF document text
    • https://cdn.sqhk.co/fipakebeb/hbWgii3/2020_election_candidates_michigan.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/Eghjhgi/rise_of_kingdoms_guide_best_civilization.pdfIn PDF document text
    • http://idealicait.site/just_draw_level_22_erasevgiep.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/gLqRLic/rogue_legendary_daggers_transmog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446502/normal_5fdf48db9e684.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/idDSHYv/love_trust_and_respect_quotes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491946/normal_5fe1175c76ab4.pdfIn PDF document text
    • https://cdn.sqhk.co/zeliravepuj/0blnPgg/baratukekonapob.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/G7iebyj/flappy_bird_hack_script.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD444 5172 bytes
SHA-256: 2df923b18d7b0e02108f4d60a889fa3f8cf6051891b3151f8064a5d03738b870
font_01_sfnt_off0000e5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EC 10312 bytes
SHA-256: 391518939cd71cbe2814a92deeb0e65fe0958cc3f83a834ea75ffdd2cdf32eab

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