Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5c22cb0687a8fa…

MALICIOUS

PDF

66.8 KB Created: 2020-12-22 08:15:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e20da0b92b19b4ba25517d4b62bbc0f SHA-1: d621b8d4df247a9d26884395ebe902e20d5fdc1c SHA-256: cb5c22cb0687a8fabb89e3536abad0b29436fb053c0b47e08d49af1f0bb487f4
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely a malicious domain used for phishing or distributing further payloads. The document body, though heavily obfuscated, suggests a lure related to a game review.

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://trafftec.ru/strik?utm_term=one+finger+death+punch+2+ps4+metacritic
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vonusirukete/wobegogoviroguveluv.pdf
    • https://s3.amazonaws.com/gofilafixu/ephesians_2_8_9_catholic_answers.pdf
    • https://uploads.strikinglycdn.com/files/b8051243-7b2d-4cc2-b2a7-3152562c9fd4/74558870604.pdf
    • https://uploads.strikinglycdn.com/files/97103108-16f2-40f6-ae0c-e09ea83bb101/29076098793.pdf
    • https://s3.amazonaws.com/tutapaxi/sample_website_templates_with_source_code.pdf
    • https://static1.squarespace.com/static/5fc549e8c6d96458363f0fae/t/5fd03b5e1c49363a9b442e21/1607482211709/stand_still_eluned_rs3.pdf
    • https://static1.squarespace.com/static/5fc7806bfc603311fbfaad69/t/5fccaadb662d5e24e09e5783/1607248603841/bearded_dragon_tank_decor.pdf
    • https://static1.squarespace.com/static/5fe02eeaff074777c986978b/t/5fe0b41ffb7de13a6490996d/1608561695154/android_18_vs_goku_full_fight.pdf
    • https://s3.amazonaws.com/jalasilunaz/buck_s_theological_dictionary.pdf
    • https://s3.amazonaws.com/kufazete/kijunuparokibemalakid.pdf
    • https://s3.amazonaws.com/kuboki/zutaxiwudeziga.pdf
    • https://s3.amazonaws.com/tugabijenovili/40722918692.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_off0000c89a.bin
1a73d2b5615f14cc191f2dd844d5e7ab8805b7d0fc1abdea2600e820b327342b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC89A 5784 bytes
font_01_sfnt_off0000dc2f.bin
f709a61232f566f8af1da0386838cbcc84af21f12a5d0359875df9b452441070		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2F 10044 bytes

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