Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f08da96c7d48376…

MALICIOUS

PDF

72.2 KB Created: 2021-01-08 18:04:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ee39fdb8fd1913238fa5b37d06c7592e SHA-1: 0c9c7474ffcbde736d112ea581bbd337dab9ae24 SHA-256: 5f08da96c7d48376c12cf405541b88ca9f3faa64ea6c3867ec2fc833a7f4bb7a
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'. ML classification and ClamAV also flagged the file as malicious. The embedded URL is likely intended to lure the user to a phishing or malware download page, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/wb?keyword=slice%20dice%20rice%20trophy%20guide In PDF document text
    • https://cdn.sqhk.co/sekigozujeme/hjieO2k/8113186981.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407994/normal_5ff795d26574f.pdfIn PDF document text
    • https://cdn.sqhk.co/gugapedulob/bshhmge/cute_hairstyles_for_short_hair_braids.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367644/normal_5fec8b711d35c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/831c759e-d789-49a4-aa77-77a6eba63552/16.9_fl_oz_into_cup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d622f64-8d5d-4b33-a045-5d443cecff92/37420736080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc039c6-c983-421d-8121-b286ef031e1a/british_army_soldiers_of_the_second_world_war.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc0f3bd9-6de6-4cc8-b220-fa38a00c2903/lawawikar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b256cb42-118f-4b9e-b60c-3063cf2407a3/modizekuzov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d925c6c0-2e28-461f-8f27-def8f3cf3e9a/calendar_2020_october_november.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74371970-4067-4954-9521-6b162070a48e/knight_chronicle_guide_rune.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_off0000de26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE26 5152 bytes
SHA-256: 9d3fb6ebfeaf713d395d47ed2a916e90e71657da60a39da0f94312832b560b6e
font_01_sfnt_off0000efb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB4 10764 bytes
SHA-256: d6a46f2ccd16416160f90babb75da3fd475dadfebe23906c2468242db922600e

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