Malicious PDF — malware analysis report

Static analysis result for SHA-256 c85e6f8468c167a9…

MALICIOUS

PDF

74.9 KB Created: 2020-12-23 21:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c79b57b2f07e36e0e96f5e65291205ef SHA-1: 767710332665e23751c1ac01ff23c872ce3f583d SHA-256: c85e6f8468c167a98cfb935891d55b33f4d7054072b5d8a447c52733a464cfaf
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, likely for phishing purposes. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

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
  • 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://trafffi.ru/strik?utm_term=ice+climbers+smash+ultimate+desync+combo PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379035/normal_5fc7493edf915.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/foneniz/32802695501.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/high_on_arrival.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f59f51-cfc3-4d9c-9902-31f8ae4a7296/3143841451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b53f4d62-66fd-450d-ae3f-b64dfb063295/the_complete_guide_to_option_pricing_formulas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6e91be1-e263-464b-be7f-06ac1a426745/noco_g7200_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bf3ff23-9803-4b1c-8b4d-673e41a89f88/modelo_de_hax_y_majluf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e3ae71-f290-4f92-9162-ed6287a42dea/46871254510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb2756fe-4c3d-4940-9693-71f53a0d245f/pixoxonagen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a35b801e-f179-479d-a638-5e26e42c7ce6/61900377087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a9e1a24-3d23-4f2f-b53f-514c137f0fcc/larin_3_ton_floor_jack_manual.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_off0000e72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72C 5360 bytes
SHA-256: 8ed7f63e8c7b0a372b8673722c549aacc73a702d6188c08f488746e67b0e1180
font_01_sfnt_off0000f935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF935 11000 bytes
SHA-256: 71f5049333ba64866d06e7764b2b7bbb6749529ec7533ebbc7accd8f6af398f0