Malicious PDF — malware analysis report

Static analysis result for SHA-256 306356dda14d3a96…

MALICIOUS

PDF

73.7 KB Created: 2021-01-02 19:13:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b6449b378ab01e6c04b944d939c48587 SHA-1: ee15dddaf28e2e9544af126e7e203aa36f471b7d SHA-256: 306356dda14d3a96c9a74f5ded1c38960a0de732e5de3a06bcdb97cf46e1ce3f
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 'https://traffking.ru/123?utm_term=polk+audio+subwoofer+not+working'. This URL is associated with phishing and malware distribution. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to redirect the user to a harmful site.

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
  • 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://traffking.ru/123?utm_term=polk+audio+subwoofer+not+working In PDF document text
    • https://cdn-cms.f-static.net/uploads/4443799/normal_5fc188a42d957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449419/normal_5fa09a558d8db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_5fb2c6537e489.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481064/normal_5fefc1717b88d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484834/normal_5fefe525a3dbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484610/normal_5fe2790ad3444.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/4d4f52a3-5451-4de6-bf13-6b5847634d93/48036154677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59efd402-0a2b-4f0f-968c-e28d6c836fcd/92242781390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd0094fa-7014-41f6-8ee1-1c2c83442901/vugomebesuvuzogusigoren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44c43768-c7a9-4329-bf4b-bfb4e95bf17b/72500063828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4d735e0-f465-4e5c-b6f1-120f67e7ca23/75640394373.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/likeness_of_oryx_days.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_off0000e2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D3 5372 bytes
SHA-256: f027a916a61f627483b909318570c084a6e9a5020886867afc11153280a1dab7
font_01_sfnt_off0000f540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF540 10956 bytes
SHA-256: 9300d2897fb0f964023270a98c6faa6b6e5e68943d74d9c30fddec85b999c7f9

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