Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f8499903a852595…

MALICIOUS

PDF

74.9 KB Created: 2021-01-06 08:12:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c6fa30cdcb384fcb997670831e655e68 SHA-1: 255b0a0e0f580074bfe642520cd458a8def065ca SHA-256: 8f8499903a8525954841f08550ece0d6e3db876dae41518b72534c6900d0e9dc
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://gettraff.ru/aws?utm_term=telugu+aswamedham+songs+free'. The ML classifier also flagged this PDF with a high probability of being malicious. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure the user to a malicious site, likely for phishing or to download further payloads.

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
  • 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://gettraff.ru/aws?utm_term=telugu+aswamedham+songs+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417030/normal_5fb4993cbc145.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/du34jgt/function_generator_with_icl8038.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457561/normal_5fcb25f9f2fcd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485589/normal_5ff1540a565df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379984/normal_5fbb4f8d52389.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391636/normal_5fc8e2b8f3f09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f99f7924ea27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412582/normal_5fa243ad65639.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/0bd78246-64f5-497f-a54f-f387d64de956/zepaxowiluwowido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/424b37da-a364-4a4d-bf80-58509fd4bc3a/33860565164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18cfd504-8a45-4802-9310-4aafa41c5f4c/bike_jump_ramps_for_sale.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_off0000e72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72E 5364 bytes
SHA-256: 3f196326c5937e18b73049099df30ae2a00a65252ffd905c0eb21b818bc04ac0
font_01_sfnt_off0000f950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF950 11328 bytes
SHA-256: 70d4945f7985fd5df899d1cb9c11e9fa81f58b97e274e2cd31b12b35b7d7fdbe

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