Malicious PDF — malware analysis report

Static analysis result for SHA-256 3523ccb4c6341875…

MALICIOUS

PDF

75.7 KB Created: 2021-03-04 20:13:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f46cce931204bef1ffed4b95e82b4f40 SHA-1: 5200bfbf531df545abc9c68d40858c457de6523c SHA-256: 3523ccb4c63418759c9feeee84a5ad10a3d3261df9642c0a74962a65b789a799
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ML classifiers and ClamAV, with a specific detection name of Pdf.Phishing.Trojan. It contains an embedded URI pointing to 'dugedepap.ru', which is likely a phishing or malicious site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://dugedepap.ru/wix?keyword=hamilton+beach+flexbrew+manual+49988 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450511/normal_600b62922ffd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448992/normal_603e4cfbaa919.pdfIn PDF document text
    • http://dk-inc.xyz/the_blind_side_movie_clipskv8p2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393348/normal_6016f76b012c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5feec72f70949.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476126/normal_603a728490c62.pdfIn PDF document text
    • https://cdn.sqhk.co/tawibonikigo/hgibnij/13283261880.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475738/normal_6007b961ced2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483331/normal_5fe757f421d9f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420468/normal_5ff33a51619fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401558/normal_603c2874aeef4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486763/normal_60144ae74f992.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470526/normal_5fe4a4d31deac.pdfIn PDF document text
    • http://stakingyfi.com/55623334961qd7pk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382790/normal_5fc8305774431.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/YhgihRd/xadinojodivuvezexik.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/jc04yge/hip_hop_beat_maker_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/FxAphih/3996050356.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/xufoxorog/autodesk_app_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/plano_cercanas_renfe.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/nejawitidiwipuri.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/lenovo_g500_bios_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/3rd_party_transformers_2018.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_off0000df07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF07 5640 bytes
SHA-256: 2aed62cb89ec95e80578821a6c627f07fd9c321b9d91cdd77ee2b54a66c8cb29
font_01_sfnt_off0000f22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22D 14924 bytes
SHA-256: 799f52d850d5406db09dc7058d9dd90e1a7ebab8bdae2274aee239a7df522519

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