Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f5c8c9894d6ea5…

MALICIOUS

PDF

77.8 KB Created: 2021-01-02 20:04:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 538b56195789084613cf6ab6e95b1191 SHA-1: 76a0eb2dd2855fbad45a743015319b3583e24038 SHA-256: e6f5c8c9894d6ea577cd260b57faafe7fff2a9ef97da19182db66554bfe2116b
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=pairs+plot+in+r+legend'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attack pattern.

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=pairs+plot+in+r+legend In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408464/normal_5f966488ed0c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375353/normal_5f8a1f36633ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384159/normal_5f945f7e60040.pdfIn PDF document text
    • https://cdn.sqhk.co/xusovatovu/jmo45jj/61555142176.pdfIn PDF document text
    • https://cdn.sqhk.co/lelogusobade/dZhhfR5/download_nerf_epic_pranks_mod_unlimited_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407313/normal_5f9f1120cf438.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_5f9e8dab7dc88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372086/normal_5f969ac5c910b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_5f969a0a4fcf2.pdfIn PDF document text
    • https://cdn.sqhk.co/katafojedul/hiPhj4R/codemasters_f1_wheel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409093/normal_5fec35c72a4fb.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/8927f16c-b1ed-46a4-8649-b40756a4e1b5/raze_unblocked_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c7e9003-572c-41b0-9bb3-f4223056a8bd/32565252241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e18f1cf0-9cb8-4b26-9b28-3f416f98ad20/4288720059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42cfc8f2-c816-49ee-a03a-f056afbc4e2e/tap_drill_hole_size_chart_metric.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c7b3d4-99ed-41cb-9e24-6707c180efd2/34026785780.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_off0000ef8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8A 5128 bytes
SHA-256: 6da9c6c2cc003a11cf9509239617c17630f4397ae1d142178bed59473cf73fe9
font_01_sfnt_off00010103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10103 12728 bytes
SHA-256: ee478d704352d3a3212c93b6e6a59bb77c72c2bd2e4b413c3839b70319694023

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