Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9a508de8db719b…

MALICIOUS

PDF

65.4 KB Created: 2021-02-27 17:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6da13feccb2b1383ffb178f1a534c884 SHA-1: f22c0b04a3dae2a974c4587730232528de0d5b23 SHA-256: 7f9a508de8db719b1592b48e889cfc4a210a5f034013aff2172956ae19309f71
124 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, particularly the one pointing to 'seumenha.ru', suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7176

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://seumenha.ru/award?keyword=the+game+changers+vegan+movie+online PDF link annotation
    • https://cdn.sqhk.co/pebekaja/gG8jdUx/69407834076.pdfIn PDF document text
    • https://tefajakitom.weebly.com/uploads/1/3/1/3/131378990/neloxax-mowiw.pdfIn PDF document text
    • https://nukawopuriw.weebly.com/uploads/1/3/4/3/134347541/3900167.pdfIn PDF document text
    • http://fumerox.iblogger.org/naruto_online_mobile_tencent.pdfIn PDF document text
    • http://kiruvoxexuk.iblogger.org/zoxujepudofodamura.pdfIn PDF document text
    • http://policyhelpcenter.com/2._2_even_and_odd_functions_worksheetwm2fm.pdfIn PDF document text
    • https://vewenaloviriwu.weebly.com/uploads/1/3/2/8/132816087/jefazarevimuvisej.pdfIn PDF document text
    • https://cdn.sqhk.co/boxewemutox/bujfggZ/6390999168.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/5596435.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://davagutuvis.rf.gd/why_use_twitter_for_business.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/tamil_cut_songs_audio_mp4.pdfIn 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_off0000d051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD051 5220 bytes
SHA-256: 80c5345db9efeb16bcc42ddb56e9a5998adecfa1c0dfb4563118180d8bf6ced1
font_01_sfnt_off0000e1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F2 11276 bytes
SHA-256: 314e19b8fd26628c49d30a44eb078cdd6db4684919dce97eddbd8e8fe6186067

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