Malicious PDF — malware analysis report

Static analysis result for SHA-256 aadfb743c16946c6…

MALICIOUS

PDF

214.1 KB Created: 2020-12-21 13:19:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 26e95136e2aa93d8c4d69869379d2f68 SHA-1: 250aec1b059e2edc7a77a4f73e5653b6b796f859 SHA-256: aadfb743c16946c61fc267df2dbb25952923f82242495189bb84c22aeef5c049
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, contains text fragments that may relate to the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://trafffe.ru/strik?utm_term=army+prt+cd1+acronym PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387219/normal_5fd85c3515b2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386084/normal_5fda819de27be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f870bfaef9c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446645/normal_5f9d7b494af91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_5f9771a863ef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_5f8c0e9fc7563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450734/normal_5fadd7cf07798.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/vonuxagupeduze/curriculum_means.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/12094220821.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/techniques_d_analyses_biochimiques.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7d305fcdb718a17c69c1/t/5fdcfc0c9f71d1130da70c00/1608317965435/14041321078.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f66f116eb00e3c4c456d/t/5fc187f761e25426e1720b70/1606518775414/jitopelaki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d38e5687f52b6b8dad8d/t/5fc738d42ac13f1ee9b718dc/1606891733557/spotify_for_artists_app_windows_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a394239b0722913c6c92/t/5fc42d2718e72e5fdb5bfeb9/1606692138563/vopakevejokivikuz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6df4944e997374a292d60/t/5fcb001d26a2be7f6ddc545e/1607139358789/galoraf.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_off00030d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D2C 5152 bytes
SHA-256: 63bdd1a3259c20fb83020318e95d62871f1b3c493af862018895d6c6a2f99445
font_01_sfnt_off00031ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EAD 14140 bytes
SHA-256: 0c6474901b4272947267b11f10193edfce433e313ead7854e2245b59703e8141

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