Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2d5908868547c7…

MALICIOUS

PDF

110.9 KB Created: 2020-11-24 21:19:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c80a666cad42f2b80210cda8e58073c3 SHA-1: eb2dc63d31f565b305d7f8bd38ea1cb168167eee SHA-256: 1a2d5908868547c729329a002f45e1d8051cc1ed981ec5a868b03ead0db5f8cc
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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/strik'. ML classification and ClamAV also flagged this file as malicious. The document body, though heavily obfuscated, contains text related to 'Word whizzle ends in n answers cities', suggesting a lure to trick users into clicking the malicious link.

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/strik?utm_term=word+whizzle+ends+in+n+answers+cities In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5f88ce24b3f92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_5fabf452150e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404757/normal_5f91571fddfc7.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/800f39bb-b03b-4ec7-9d12-28530347dbe9/78573345454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eef1a3e-74a7-4173-8a0c-2bb1faf07bd6/97031372422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a6c97a9-7cc2-4f23-a83c-7e74a73cf39d/wesajanavofepetefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0192e077-e690-49ec-8fe0-b23889856dbf/android_application_framework_architecture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7492a79e-14fd-489f-9d4a-c162d795eaf5/limigiresukegizudoxibon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47006699-36de-40e1-a830-bf92a43aa914/sesinaxula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24bfc4e6-cd71-444b-a84f-ec3799bdd857/44383293407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c311bc-c78e-46f2-9cc3-8c08684aa813/87949021899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3dd1c68-5247-4e61-8c34-71cea98510cd/far_cry_4_free_download_for_pc_full_version_with_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63ba4d62-df0a-49db-9d92-eab839427f4a/dd_4e_avenger_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34f95603-9e7f-49bd-b88b-b614d7b5f562/25752473169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19655fed-9b82-4f2a-bc34-cfa215c15d49/18795626214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05153c51-0861-46bf-a1fd-4e41cc71a08d/44708308130.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_off000175a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175A0 5180 bytes
SHA-256: 3aabc4534d90aace01ebed54388ad6a4e940311bd44a5b562c613b4717997ccb
font_01_sfnt_off0001875a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1875A 11260 bytes
SHA-256: 1759b85a0131ab526abad80152c7c06614bfab6c3e0ed5461b587341148bab3c

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