Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43eafe673a3cc93…

MALICIOUS

PDF

59.5 KB Created: 2020-11-17 17:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 819d3867a7eec7e430d50094dddf5f8a SHA-1: 7500c24a3ea25a2020871b05f026449f0162cef2 SHA-256: b43eafe673a3cc937f594492cf529efb5d3e018277cadcbf7ccaba5d7abad4be
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 'traffmen.ru'. ML classification and ClamAV also flagged this PDF as malicious. The embedded URL is likely used to lure the user to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=oh+for+a+thousand+tongues+to+sing+praises+unto+thee In PDF document text
    • https://cdn-cms.f-static.net/uploads/4487665/normal_5fad12ff54472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366964/normal_5f9434b5ab2f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f86f8d7c93fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426966/normal_5fad504b48400.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/3d3d75d1-65cf-48b7-b399-d26a5da44788/pavadasiz.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/cagliari_mappa_turistica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc5d3b2-9c60-4c54-bae0-41bb8e623d79/24195145040.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/runamef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aee4148-b6e7-4995-acd7-9cb64ac13293/damugefumizamefilidebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/305c5559-37a1-41ad-b5a7-8fd699262bc7/dusir.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/prism_and_pyramid_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de4f124-f146-4a76-9dfb-880b56c47fde/pexirojedowolux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a6b0506-b0c4-4e0a-b505-a3af409dd3b7/pelicula_de_ladron_a_policia.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/bricanyl_expektoran_100_ml_surup.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/unblocked_games_tetris_d.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_off0000ae38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE38 5300 bytes
SHA-256: 8251d3a24db49a230d85d88aa6e69a1cdd87235472f02b4c10a6f27260ff68de
font_01_sfnt_off0000c036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC036 9564 bytes
SHA-256: 6418883726fb57071d6e0d3ff7b1901e5e438f806b326dc546c0c9034eb4b19e

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