Malicious PDF — malware analysis report

Static analysis result for SHA-256 23fd73689c0cbb36…

MALICIOUS

PDF

66.6 KB Created: 2020-11-14 07:21:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1d5db3451f67856595f6ef9dcc25282 SHA-1: 188d3b7618017cfa296ce722510e877a5f6462c7 SHA-256: 23fd73689c0cbb3604aa54b65cd6ccf1e569e36faf1b1d4a5145acad0d1d3d7b
94 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafficel.ru', which is likely part of a phishing lure disguised as a free PDF writer. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7511

Heuristics 3

  • 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
  • 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://trafficel.ru/aws?utm_term=acrobat+pdf+writer+free
    • https://cdn-cms.f-static.net/uploads/4390680/normal_5fae866b6a604.pdf
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5faf2b72afd4e.pdf
    • https://cdn-cms.f-static.net/uploads/4384050/normal_5f94fc3ba71d4.pdf
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5f939a9acda68.pdf
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5fa3054342e10.pdf
    • https://cdn-cms.f-static.net/uploads/4417814/normal_5faf07b23d8a4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/memul/the_nether_play.pdf
    • https://s3.amazonaws.com/pisik/my_dear_boss_unblocked_66.pdf
    • https://s3.amazonaws.com/rimepusox/d-block__s-te-fan.pdf
    • https://s3.amazonaws.com/zerejibixupav/55467253600.pdf
    • https://s3.amazonaws.com/zirojopemup/ramolaxewesojivusajakuk.pdf
    • https://s3.amazonaws.com/wonoti/the_gender_game_bella_forrest.pdf
    • https://s3.amazonaws.com/pibajuwi/charles_raymond_watch_set.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccd3.bin
03c322dcf154b849f5eb6b5ce4eac2ef318e649f4c187e1a655b58aa5e8773c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD3 3240 bytes
font_01_sfnt_off0000d87e.bin
faf0931d355c87fc3723273398166e0cc5889d8c7c464ede1e85f59b55970d43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD87E 5160 bytes

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