Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab9d89b40dd6c38…

MALICIOUS

PDF

82.2 KB Created: 2020-11-29 19:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: efb0ed37792895c07feac25017adbef5 SHA-1: ed6d856421f715f28fb1a1388abfbd0f579a0b59 SHA-256: 4ab9d89b40dd6c38959af0b6e40152a342f717b37190dd86cc6e275206238a73
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/strik?utm_term=oregon+trail+diseases'. This URL is the primary indicator of malicious intent, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV also flagged the file as malicious, reinforcing the assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=oregon+trail+diseases In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451049/normal_5fb764a7bd396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f971f9c47a48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382613/normal_5f9a384a258b8.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/wixanarer/teviniwewemoduladasomebu.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/15517063459.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/bipevidexezud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f61b21e0-ce01-456a-ab09-24ff05d83c38/programmable_logic_controllers_5th_e.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/lutenibotusejo.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/video_helper_premium_status.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/trailer_plug_adapter_4_to_7.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/area_code_645_mexico.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/nes_emulator_for_android_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/fujurapuwumukod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a1cafc6-3dac-4fc0-9b37-fb1dc523aae2/a_child_called_it_full_book_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/960ba354-778f-4322-9a8e-ceaa0d77a1ac/87588266727.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_off0001067d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067D 5020 bytes
SHA-256: a95623ecbd295bcd593d99a56add501b66f1db05fbbecdf92621b567b2a68631
font_01_sfnt_off0001179a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179A 10804 bytes
SHA-256: d7047d960e3b2c014021868dca1fce6fc0e1bdc1cd790f87db9bc3f4e08b3063

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