Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e42edd5f2b7ee83…

MALICIOUS

PDF

66.5 KB Created: 2020-11-13 23:18:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2361525d9c1dc4b519125baefb42f3ee SHA-1: b6d0ed8219c3f0b7d0dfe816e93cc79c0be16cef SHA-256: 4e42edd5f2b7ee8311cd88c237f8115e5cde7f9cef8b5f2a73fae4fe096dc350
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/strik?utm_term=osrs+attack+guide+p2p'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffking.ru/strik?utm_term=osrs+attack+guide+p2p In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_5f98901670562.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f87151c6bb85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f9fdcd30e1be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_5f9bb86b152f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f894a45c549a.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/d13dcdef-ff94-47d8-a688-28efa7701179/schwinn_deluxe_child_carrier.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/2011880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1881bf6-3e13-4ba8-ae9c-5811aac85a01/bokakisazufi.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/muvisiriz.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/72963575529.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_off0000c83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83C 5432 bytes
SHA-256: 2ad1b5b1e109b93f4df62853ecea0af1c8cfc7088d11649baa588f92bd74040e
font_01_sfnt_off0000dac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC6 10256 bytes
SHA-256: ccf43a543ba93e71eaecc22e7988f1e3c958f764d59bed0dd0d8fabdb8d3a3f7

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