Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c45ed2c5b31ce7…

MALICIOUS

PDF

68.1 KB Created: 2020-11-25 08:47:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d36893674005a819449d1a48a8869237 SHA-1: 1c68767b0bbae6ee9b979e380382c0a953666275 SHA-256: 89c45ed2c5b31ce7a1c41bfa0bb0ebff6012dad505ff4b3b4e919ea6f40a6244
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

The PDF contains a malicious redirector link and is flagged by ML classifiers and ClamAV as a phishing trojan. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document attempts to trick the user into installing a browser extension or update. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/strik?utm_term=sopranos+theme+song+lyrics+woke+up+this+morning
    • https://luwinititik.weebly.com/uploads/1/3/4/5/134587042/9828889.pdf
    • https://fegikunula.weebly.com/uploads/1/3/4/4/134482285/3231280.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ab42c1ab-49fe-4736-9924-4695b64af675/pojonobopuxupedudin.pdf
    • https://uploads.strikinglycdn.com/files/800b0cf1-7107-470e-927e-b07f4ac585a0/dafuz.pdf
    • https://uploads.strikinglycdn.com/files/f4c997f6-14b6-46aa-9cfe-031a08b8e238/risalonatot.pdf
    • https://s3.amazonaws.com/ronatiduzoxij/bleacher_report_transfer_news.pdf
    • https://uploads.strikinglycdn.com/files/7622e583-d650-4ed0-a8df-8549b32cd3f5/19757793244.pdf
    • https://uploads.strikinglycdn.com/files/3c808a52-e3ef-496f-9932-07d082318992/99974491801.pdf
    • https://uploads.strikinglycdn.com/files/1c07300f-e211-45a1-b8c0-8ad77abcc463/47596751699.pdf
    • https://uploads.strikinglycdn.com/files/aa7d9d6b-3020-4293-b238-d8b357cb72a6/josudulunofajojegek.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf15.bin
ae6bbf564443d3463103c97003c1c9236f02d19795b723e29f8004f3527be40d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF15 5708 bytes
font_01_sfnt_off0000e26e.bin
068ff3496abf0021b8eea2b8c2a10d488427bde2287a98dde049ba5ac04b9ddc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE26E 9576 bytes