Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bce3e925cd87ff6…

MALICIOUS

PDF

72.5 KB Created: 2020-12-25 13:49:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0846713d200386460224f76f2f1703f6 SHA-1: 25efe9a4b4e3280eab04a298823cc2776872fb89 SHA-256: 6bce3e925cd87ff69c1ee74ee9480c61f5e11d0067ad82a0aa3f1ee521953a36
96 Risk Score

Malware Insights

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

The sample is a PDF document that contains an embedded URL, likely intended to redirect the user to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit vulnerabilities or trick users into visiting a malicious domain.

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://trafffi.ru/strik?utm_term=sky+movie+premieres+this+weekend
    • https://cdn.sqhk.co/kiranagel/iPhj1JC/naponoja.pdf
    • https://cdn.sqhk.co/lewivapawo/jdiceii/96956538376.pdf
    • https://static.s123-cdn-static.com/uploads/4481157/normal_5fe1fac1a39df.pdf
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5f89fcf99b59d.pdf
    • https://cdn-cms.f-static.net/uploads/4470385/normal_5fb255eaafc25.pdf
    • https://cdn-cms.f-static.net/uploads/4410962/normal_5f9d51fdcf378.pdf
    • https://cdn-cms.f-static.net/uploads/4370088/normal_5f8d41bb4ede4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vazisi/steve_jobs_alien_technology.pdf
    • https://s3.amazonaws.com/figidireki/sans_and_papyrus_sprite_sheet.pdf
    • https://s3.amazonaws.com/jofunozuzof/the_skilled_helper_a_client-_centred_approach.pdf
    • https://uploads.strikinglycdn.com/files/b1308516-26ba-4efb-aadf-fadb4c4d418a/15753625418.pdf
    • https://s3.amazonaws.com/kavalukato/top_rts_games_2020_pc.pdf
    • https://uploads.strikinglycdn.com/files/7488a6c6-4ddb-462e-80bd-74afd95a3d30/lasoliroka.pdf
    • https://s3.amazonaws.com/zesixefe/pinefiwiw.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_off0000dce2.bin
3de706db5022c2cb3b7e0e9b2054a955f3bdbd1258c981dfdbebf94425076195		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE2 5380 bytes
font_01_sfnt_off0000ef1f.bin
1e125afd9a05853e8e14e0011e70c1ccf69d64658288698451d75252a27994b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1F 11240 bytes

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