Malicious PDF — malware analysis report

Static analysis result for SHA-256 daee08054a017394…

MALICIOUS

PDF

74.5 KB Created: 2020-12-22 08:58:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: befa14f9f44159f027e59a06b8eedc7a SHA-1: 775bc0fe1fd66b74d47c6e91d7c79edbb1150149 SHA-256: daee08054a017394ad74cf62f0fa87518d5e1fe0ffec48d3fd116774b5f4cc9e
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://traffmen.ru/123?utm_term=body+rider+deluxe+folding+bike+manual'. ML classification and ClamAV also flagged this file as malicious. The document body is heavily obfuscated, but the presence of a malicious URL strongly suggests a phishing or malware delivery attempt, likely initiated via spearphishing.

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://traffmen.ru/123?utm_term=body+rider+deluxe+folding+bike+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4492246/normal_5fd5f069207ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421038/normal_5f9ed69ff0d57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426415/normal_5fbff092eac60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409992/normal_5fcf3b23a84f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f99c38c1c1ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415073/normal_5fd7c0faeac4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380237/normal_5fbc1b8eeb288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_5f92f955bb1fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466659/normal_5fae2ddcb9267.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374211/normal_5fcf144947ed8.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/fulosobezur/casula_high_school_uniform_shop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44cee2f7-aede-4a05-8662-d2451bcbb20f/mass_effect_3_endings_ems.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1162b68612547ed5f39f0/t/5fc1fe593570fb44d1493ff5/1606549082327/cheat_criminal_case_save_the_world_mod_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29575be9b693951158987/t/5fcb261b551bdc47e7a3e091/1607149085500/fijugititamixarezupapime.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/nikodejotanometinazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16269a10-7fa1-4d53-b892-80e6cdd18e0e/tactics_for_listening_second_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0db4b08-91a7-4ef0-93b0-4dd92a298bce/xbox_games_iso_burn.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_off0000e66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66B 5472 bytes
SHA-256: f44e467384d47d3abd6213e3d8abbbd61c1c8fafab0aa55ee9ccf1bd26dd4988
font_01_sfnt_off0000f909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF909 10388 bytes
SHA-256: da08a563267a1570476dc5f1663433140e4bf60956125c810f5a3795d3d5a5a4

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