Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f20ec2b665417ce…

MALICIOUS

PDF

81.2 KB Created: 2021-02-28 16:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72910172b16ba43927966762ac16bc0b SHA-1: b8d58738e3d4565790a4daa353f193a3115be67f SHA-256: 2f20ec2b665417cebaf0d59663e62164e7a2fb22144e3d502a4466ec9e7701e5
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains an embedded URL pointing to a suspicious domain, likely for phishing purposes. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=link%2527s+awakening+switch+review
    • https://cdn-cms.f-static.net/uploads/4486987/normal_6014853b37e19.pdf
    • http://vowufijetapiko.sportsontheweb.net/71942053525.pdf
    • http://mekujoviwe.mypressonline.com/forgotten_realms_gods_5e.pdf
    • https://cdn-cms.f-static.net/uploads/4373779/normal_5fe810f257521.pdf
    • https://static.s123-cdn-static.com/uploads/4470679/normal_5feb9f43ce1d9.pdf
    • http://lunatan.medianewsonline.com/kanuwavexufosag.pdf
    • https://cdn-cms.f-static.net/uploads/4495059/normal_5fdad49f12838.pdf
    • https://static.s123-cdn-static.com/uploads/4382643/normal_5fdd1df52c334.pdf
    • https://cdn-cms.f-static.net/uploads/4459055/normal_5fd1194698a64.pdf
    • https://cdn-cms.f-static.net/uploads/4428035/normal_60255e5c53034.pdf
    • http://rixorevu.getenjoyment.net/how_to_name_your_best_friend_on_snapchat.pdf
    • https://cdn-cms.f-static.net/uploads/4369333/normal_600fa045d57fd.pdf
    • https://cdn-cms.f-static.net/uploads/4476421/normal_602d08861a9dd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kigavanus/14737229369.pdf
    • https://s3.amazonaws.com/nefunupu/2379556554.pdf
    • http://zuvuzevo.atwebpages.com/college_student_interest_survey.pdf
    • https://s3.amazonaws.com/jowutoneranemuk/authentic_assessment_definition.pdf
    • https://s3.amazonaws.com/desekusoxi/guidelines_for_medicaid_in_sc.pdf
    • http://zoligagomuwe.onlinewebshop.net/19622985756.pdf
    • http://jowawaba.atwebpages.com/23250009256.pdf
    • http://pozidijapepore.atwebpages.com/hp_laserjet_p2035_printer_full_driver_download_for_windows_7.pdf
    • http://kofaxafogi.myartsonline.com/xopimofir.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010236.bin
d2466dea4617697769b44c1ea88c39f32debada97b9016c56f88cad4dd0d114e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10236 5220 bytes
font_01_sfnt_off00011420.bin
d9e1c3806cf7774ba7f0ac2c918de0d10f8c2906480c13523a9573f3bfb29e92
pdf-font-stream PDF embedded font (sfnt) at offset 0x11420 10356 bytes