Malicious PDF — malware analysis report

Static analysis result for SHA-256 397ef66411a3dc69…

MALICIOUS

PDF

84.3 KB Created: 2021-01-09 14:51:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7198bf2137e6db8ae24ec652a5ca115d SHA-1: 15ca0173f9a56048bdc4df486ce7e9296fdc924d SHA-256: 397ef66411a3dc6942b0fd7d637a6006250089530c2600ef7cc5710e24f3a1dd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://gettraff.ru/123?utm_term=words+for+earth'. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/123?utm_term=words+for+earth In PDF document text
    • https://cdn.sqhk.co/wawerugile/ghdF2Fq/brick_breaker_game_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/jpib2in/pafigogodizizifoni.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/kidihem/vimelagejasav.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/hhNsXhb/vocabulary_activities.pdfIn PDF document text
    • https://cdn.sqhk.co/linigurep/4hfDjgV/4837984576.pdfIn PDF document text
    • https://cdn.sqhk.co/letojeka/Tejijhg/brad_s_deals_apple.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/40a5cd3f-edf2-487f-980d-9c3c1a8e9d4a/nubibefesojuluwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45708f58-ea03-4a3c-b424-245fc72cc55e/gupekukosif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fffa5b11-4c5c-405a-a974-935822f5993f/skyrim_clothes_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc00669d-9bfd-42e8-bac5-9b43986f852f/dowapajisibajoleg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81467ca9-65fc-4e48-a806-b5e206095f01/how_many_times_around_a_track_is_800_meters.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/74541172428.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21A 4976 bytes
SHA-256: 819eea3a8a6f8c9b0f31fae6a50a1ad48bc78faac9e0602d6cb4a0b5dbbeebb6
font_01_sfnt_off0000f304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF304 5416 bytes
SHA-256: 4983a767661c0398271801d812cf05a291bee9a342670d5e04ba13145889ec3f
font_02_sfnt_off00010697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10697 10736 bytes
SHA-256: f40b3f6c76448d31995f3f05334b4803cce01d009538c3f5366f8611b9afd6b8
font_03_sfnt_off00012ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA1 16700 bytes
SHA-256: 6f2c9a6f8bc00a0342f99d453ec7f7b86e6960696957a88e48b58b56d0090f5b

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