Malicious PDF — malware analysis report

Static analysis result for SHA-256 9351054f3cafdf43…

MALICIOUS

PDF

77.4 KB Created: 2021-06-08 02:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6a56d05eeeb3f609ab8a7ed90b45fa8f SHA-1: 04a413a303d7deb3b7752944ead300a18e49a10c SHA-256: 9351054f3cafdf4326b7ce64a48d2cad8d0f1904196525bb84bb5ea4ca6e49c5
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely to facilitate phishing or download further malicious content. The document body, though heavily obfuscated, suggests a lure related to a game trainer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://ketchas.ru/pbw?utm_term=battle+for+middle+earth+2+trainer+1.00 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366665/normal_600c41333888e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490127/normal_5fe4d2519d912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478134/normal_60373dde498e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_60459f0893c3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488809/normal_605d2fd7b7c65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463810/normal_60170bc31195c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460709/normal_5fcd7f3b7fbb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477651/normal_6020ae27beb1a.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/e5614d0c-acb7-4aa5-bd7e-7f249c01b23a/short_summary_of_hamlet_act_5_scene_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f22640-bbc0-48a7-9e62-d3ed803b5367/what_does_360_degrees_mean.pdfIn PDF document text
    • http://kikipudojuzo.pbworks.com/f/17544105218.pdfIn PDF document text
    • http://bupataved.pbworks.com/f/where_to_watch_free_movies_no_sign_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4296b91-bdcd-4734-83b1-b2553c453735/honda_manual_transmission_fluid_alternative.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dd15c31-3d7f-41dd-b9cd-91b620552796/hp_officejet_5740_not_printing_black_ink.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11c2decc-bf6d-4c6a-8bbf-a76cf212f835/6_themes_of_ap_world_history.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_off0000ecd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD7 5376 bytes
SHA-256: c5e33eec20237120d447bcf97e5049a69b416b45f2daa5857af54df74ef8f434
font_01_sfnt_off0000fefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFC 11876 bytes
SHA-256: 56d04e26edcafe3b1864ea098f6656fc84c610b141301dbfb83c2db5958b01e4

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