Malicious PDF — malware analysis report

Static analysis result for SHA-256 6177fe9a9b82ffa7…

MALICIOUS

PDF

77.6 KB Created: 2021-01-09 12:42:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4f504ce2f7117e8e6653b0271760f66e SHA-1: b4bc04bf666e2f3b6e8ecdf51be5cb1daa2f0866 SHA-256: 6177fe9a9b82ffa729c854f274d9e124a49c49d09fbbdeee102376c54b1056e0
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, one of which, 'https://traffine.ru/123?utm_term=ski+boot+dryer+diy', is directly referenced by a heuristic. ClamAV and an ML classifier flagged this PDF as malicious, indicating it likely serves as a phishing lure or a downloader. The presence of embedded URLs suggests an attempt to redirect the user to malicious content or download further payloads.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/123?utm_term=ski+boot+dryer+diy PDF link annotation
    • https://cdn.sqhk.co/nudabesawi/jvhfYwx/52889305477.pdfIn PDF document text
    • https://cdn.sqhk.co/vijasezadida/hbhfPjc/run_dinosaur_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/shdPhhK/mods_prison_escape_maps_for_minecraft_pe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470979/normal_5fad3e8880468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468819/normal_5fbdbe9142cd0.pdfIn PDF document text
    • https://cdn.sqhk.co/jajotulix/snAjhjg/game_of_thrones_characters_season_1_to_now.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393356/normal_5fab7a2672d1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416494/normal_5f99a94bec877.pdfIn PDF document text
    • https://cdn.sqhk.co/zifalulog/4YieQVE/penozuzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5f9c0088ed286.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366976/normal_5fed53cad1835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426945/normal_5fa0546dc4a4e.pdfIn PDF document text
    • https://cdn.sqhk.co/sobutexe/6hfGnii/betigavipedinavo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455902/normal_5fa2f75b738e4.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_off0000f3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D9 4808 bytes
SHA-256: 84abc9ba4aa598e84cf34ccbb71767f0dbbdfb25766f7d85de4319540e7ecf44
font_01_sfnt_off0001044f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044F 11416 bytes
SHA-256: 0f6207f8825b1ae971c6ca26b0ea0307aff587177dbd00d2c656d8fb226de0f8