Malicious PDF — malware analysis report

Static analysis result for SHA-256 e185217739adb4cb…

MALICIOUS

PDF

76.7 KB Created: 2020-12-30 08:23:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 72e4a9ffca4deb9e07dcc7b1cd929fc5 SHA-1: 1da550ca37bf0581d5bd365a92cd3b8c3beedad1 SHA-256: e185217739adb4cb9335d8fcd7f3a24328ef4c0acc51520af65083287c48bed8
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 'traffine.ru'. The document body, though heavily obfuscated, contains text that appears to be a lure for a movie download, suggesting a phishing attempt. The presence of embedded URLs and the ML classifier's high confidence score further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffine.ru/123?utm_term=no+manches+frida+full+movie+google+drive In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f948e268772c.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/9v40iiW/27088833147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_5fa19e3cefc03.pdfIn PDF document text
    • https://cdn.sqhk.co/duditizonut/2ibjazG/65944085322.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/Ndtijib/infinity_loop_level_111.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/pukiza/animated_gif_bouncing_ball.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/sefigivajuk.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/simidaguwebomareziwuj.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/lufawebedoka.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/dotujifet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AC 5464 bytes
SHA-256: c1b9e3fe3b6aa49200ff9d7c63f70ebac3336ab4eb324e2373029f4382e23147
font_01_sfnt_off0000ea23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA23 11272 bytes
SHA-256: 30db3bff2459a8bd8e2e0597b428e8b47d34efd4d7f00627ad0c5765cb25b9f4
font_02_sfnt_off00011028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11028 16220 bytes
SHA-256: 0c9c1b0cb3107cd959c17dce7c558945eec0149eb50fbb1956368d51d169db3b