Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce35e72a145ef8f7…

MALICIOUS

PDF

71.0 KB Created: 2020-11-25 01:17:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3b42c9373019b669dc8f5c5e3bbbebc2 SHA-1: 91db2c26f38fa593ed2d29c5429ee57670317b96 SHA-256: ce35e72a145ef8f70e4c0b8d72b1e6cbc7e48e240a3869a3514770cf2fb71b59
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://traffmen.ru/strik?utm_term=sybil+book+by+flora+rheta+schreiber+pdf'. This URL is likely used to lure victims into downloading further malicious content or engaging in phishing activities. The ML classifier and ClamAV also flagged this PDF as malicious, supporting the phishing and redirection attack pattern.

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://traffmen.ru/strik?utm_term=sybil+book+by+flora+rheta+schreiber+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_5fb824d430775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379370/normal_5fa30540ab0db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420745/normal_5fbc38efa8e2e.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/a18630ca-2892-41e3-935a-2adb90190e08/54649223048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87fdac6c-f273-4248-9693-9e44b35cd3a9/liwemeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e132ba90-4784-4138-9318-c22055afa90a/guvabuwonexefiruforo.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/faxibubezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/884c2b7d-8a7e-4d62-88a4-ea2497e75b7a/knowledge_matters_budgeting_and_saving_answers_sim.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/elixir_storage_coc.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/lepodi.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/dokkan_battle_apk_mod_unlimited_stones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e85e3f-66b8-4b3d-8bc8-2eb4fa3dfbd0/84732545899.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_off0000d932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD932 5652 bytes
SHA-256: fddb0df1886a1403952ef5ec24689f27b93719c00e83c81f93f434a69cae37f9
font_01_sfnt_off0000ec69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC69 10092 bytes
SHA-256: 5928662776f7f1756fae6aaeaae0250aa70a21f29282bcb5fbd5687e25b75954

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