Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b944d007cc5f6c…

MALICIOUS

PDF

76.2 KB Created: 2020-12-31 15:51:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 428aabb9795203547ad7f103fc508283 SHA-1: b96fb9fae43a04ba9991b5e698a6dfafea0a1730 SHA-256: 42b944d007cc5f6c1165d09125073515b2db9c9a51e086d514dc6de2647466a1
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://traffmen.ru/123?utm_term=nba+live+97+pc'. The document body, though heavily obfuscated, contains text related to 'Nba live 97 pc', suggesting a lure to attract users to the malicious link. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

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/123?utm_term=nba+live+97+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448991/normal_5fd9141218aaf.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/bhhjdjc/mp3_cutter_and_ringtone_maker_apk_app.pdfIn PDF document text
    • https://jotovaxawunujej.weebly.com/uploads/1/3/1/8/131856347/zetefafo.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/6915813.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/towutoginadivu/c_member_function_template_parameter.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/tillie_olsen_i_stand_here_ironing.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/brazil_song_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/find_vertex_form_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/teleological_ethical_theories.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/9523755299.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/21903474070.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB8 4548 bytes
SHA-256: b4cef432c96861cd3cd1ce1b2ef48b04e2c8f8504dffc8a307fb7e0586d61c1e
font_01_sfnt_off0000ee3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3F 12504 bytes
SHA-256: 6d1d5e6c1a4af73428a676220825935b5427fb139e0c8a9b70bd4fea6f32d69e
font_02_sfnt_off00011695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11695 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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