Malicious PDF — malware analysis report

Static analysis result for SHA-256 4725613e3a67d395…

MALICIOUS

PDF

64.9 KB Created: 2020-12-15 18:49:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 830ffd4f1143b40ce76f7c2391762b06 SHA-1: 01f9a26a185eb77bfe71628a756607f17c7463db SHA-256: 4725613e3a67d395906ba6c291604ed5189470633947d50a2e4430945b88d126
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating a phishing attempt disguised as a driver's education exam. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest it's designed to redirect users to a malicious site.

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/123?utm_term=drivers+ed+final+exam In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409997/normal_5f9e03ac3cb9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426422/normal_5f9cd982156f2.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/zizene/89811066839.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/aids_ki_full_form_bataye.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/lefomumutade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/805ef066-b0f9-461d-819a-79e2bc74be59/jogiloxo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf604e3570fb44d1fa6285/1606377551509/hanuman_chalisa_lyrics_in_kannada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a4a0a7-3deb-4cc5-9efe-fa7d1c1c00e3/gokulok.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c475c89e1c4b8fdffacc/t/5fcc3bba920f47545b869fe8/1607220154659/giwubuvavemasunutupawifus.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/avengers_endgame_bluray_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/legofomerezijaxenutitewil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dbdda1f-8afe-4588-b9ef-50645f5466f9/download_stickman_creative_killer.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_off0000c4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E9 5180 bytes
SHA-256: 07254d374f524673500c3271b314a330ea1b2e56f9a353f5fc8e3e89b85a8842
font_01_sfnt_off0000d67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67F 9704 bytes
SHA-256: c5005404b2027b1af8d47ddb0d2d9dfe9b622eb30ca414021f3480cb69e2e925

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