Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5f9e6e4332c487…

MALICIOUS

PDF

71.5 KB Created: 2020-12-31 23:38:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b554ac026bc65fb4b36a445ea0eae57c SHA-1: d9e0cd493b8f660dde7b4bb59ec1fe698d655ba9 SHA-256: 3e5f9e6e4332c487579134f6b6817d63973bb00349e9552bc12494ebe08a655b
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/123?utm_term=cast+of+little+mermaid+2020'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a compromised site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=cast+of+little+mermaid+2020 In PDF document text
    • https://cdn.sqhk.co/fawabanof/Lggehd2/grand_hotel_mania_cheats_level_40.pdfIn PDF document text
    • https://cdn.sqhk.co/xoradofexul/ijevqB0/pekadububapilugex.pdfIn PDF document text
    • https://cdn.sqhk.co/kakumipoman/T0GhfL1/carx_drift_racing_lite_hile_apk_indir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_5f9348a066a68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/muvosefaxuzarezupejiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f42c00f-6d8d-49f3-9e40-577f2b52e2fe/4892702770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9678279e-d0cc-4d68-9de1-225e55e96339/9.3_practice_b_geometry_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/484929f5-ef15-4983-9014-ef9da8b2cfaf/rijeribamosiwifafuzifab.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/cannot_chrome_on_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/cisco_3750_ios_upgrade_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f46cf9f-dfd5-44a2-811b-cabf54da161e/83297347220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a382a811-9860-4df3-a9aa-a5767db45372/23256346842.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/aoristo_griego.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_off0000dad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD3 5232 bytes
SHA-256: af9ea93db57c8bdc3e53b49f04f84017287f576ac5d4d1dcc315bcd7a926d985
font_01_sfnt_off0000ec83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 10980 bytes
SHA-256: c37370fd37d735b3e7e5b7d45e837727a40f9721e2bf06b5e0343b9d8ecb498c

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