Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc32f7c424e709df…

MALICIOUS

PDF

66.5 KB Created: 2020-12-23 20:06:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc8967ecbb3986ea5d8c31383e23f6a7 SHA-1: d7da34dd9704eaa2ead4df1ceadc2b02162ffef4 SHA-256: fc32f7c424e709df5076b81be23d91bae34e677c1bfd45c15caf2b5025c58fdb
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffine.ru', which is likely part of the phishing lure. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site.

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://traffine.ru/123?utm_term=the+sham+borderlands+2+farming
    • https://cdn.sqhk.co/jalizovi/RBn7PhZ/jevek.pdf
    • https://cdn.sqhk.co/bivadudit/KbjfUji/sasefiw.pdf
    • https://cdn.sqhk.co/kowazodonaf/EhRicgf/bujaridetenawap.pdf
    • https://cdn.sqhk.co/lutaxudepoje/EiaMgd6/19102735076.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/54e8f7c1-29db-4127-9816-7913c61d8ca9/vurodomawibamesa.pdf
    • https://s3.amazonaws.com/pesetufavo/bony_mwaitege_ni_kwa_neema.pdf
    • https://uploads.strikinglycdn.com/files/346bab90-d61e-4d2e-b6e1-8cd039fd2574/74825736389.pdf
    • https://uploads.strikinglycdn.com/files/79bf6d9e-d85e-4827-bfe2-1e44ca1fae8d/sugojarumipifusa.pdf
    • https://s3.amazonaws.com/gewisetug/21561353247.pdf
    • https://uploads.strikinglycdn.com/files/5df43ee2-8ec9-4221-b7ec-963d0a973ff7/78755148863.pdf
    • https://uploads.strikinglycdn.com/files/b7005730-904f-4d99-86f2-736dced7dcb7/norotediloxu.pdf
    • https://uploads.strikinglycdn.com/files/0c571acc-3b29-4433-9fbb-bf94d56ef0b1/principles_of_healthcare_reimburseme.pdf
    • https://s3.amazonaws.com/wozowuledij/clockwise_and_anticlockwise_turns_worksheet.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_off0000c49b.bin
5bb4243c610d67f6220eea2e433b37472d724122c0742680fc5345cc30a0a632		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC49B 5540 bytes
font_01_sfnt_off0000d741.bin
d40aa44a091d27cad8047ae172a27b92008a30803e649626a7e411bd6620b327		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD741 11900 bytes

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