Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a634694fd5d4375…

MALICIOUS

PDF

74.3 KB Created: 2021-01-02 14:07:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 13a9b4f22eba68c168cdb97f3c168042 SHA-1: 51f4b4145cf0ee04d4e5be492a997bcfab952b58 SHA-256: 6a634694fd5d43759c295a6a527741a16f897f9bdbe713e343f737ca7792134e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafftec.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, appears to be related to verb conjugation, serving as a lure.

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/aws?utm_term=coniugazione+del+verbo+accettare+in+forma+attiva PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417815/normal_5fdcefa5279ed.pdfIn PDF document text
    • https://cdn.sqhk.co/bibilofefi/dje5jcq/download_game_ninja_arashi_mod_apk_android_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469852/normal_5fda72ddebe17.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/ihAhajb/85043424988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445889/normal_5fbc39284a3c4.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/an5glgf/limom.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/gjXNghO/18997596528.pdfIn PDF document text
    • https://cdn.sqhk.co/joxipadij/rjj6hic/top_100_marketing_companies_in_usa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417992/normal_5fcb20150ab2f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8785b3ff-8d14-46e0-b6ee-0b1d2c12f9a0/58364568956.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/buchanan_elementary_school_va.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5729d7ac-3ad5-4e24-a037-9f8925a56c1c/soxejobijolinomudamugafe.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/ladki_aankh_mare_song_bestwap.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_off0000e450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE450 5320 bytes
SHA-256: d8afb60111281b3ea0741396fc57173f670d438a7af12ab8b4dc817c8b1fa68d
font_01_sfnt_off0000f663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF663 11112 bytes
SHA-256: 12433ac65d72b73570a375b3d4cbfeba56124cdc3d80b2df3146af2f700f6939