Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a4fb724e958edc…

MALICIOUS

PDF

60.7 KB Created: 2020-11-26 09:20:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac04ee6cffa49bdbba55832a3d2da724 SHA-1: 543d49be1bb7fb5c0576e031f36adbb3fccb7af5 SHA-256: f4a4fb724e958edca28f7e2ec7ed4d54b84cacd666f12a916b87835d06e77c15
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, indicating a phishing or trojan payload. It contains an embedded URL pointing to 'trafffi.ru', which is likely the malicious destination. The document body, though heavily obfuscated, suggests a lure related to an iPod Classic manual, consistent with a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=ipod+classic+30gb+manual
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f9a50b7247a6.pdf
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5f8964fe95b8d.pdf
    • https://cdn-cms.f-static.net/uploads/4449775/normal_5fb256d1a74dc.pdf
    • https://cdn-cms.f-static.net/uploads/4375197/normal_5fb3ec906958e.pdf
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f88b68952a72.pdf
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5fb9dd9f12775.pdf
    • https://cdn-cms.f-static.net/uploads/4372967/normal_5fbe41451d012.pdf
    • https://cdn-cms.f-static.net/uploads/4383308/normal_5fbc74f9a0a95.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jefazaxal/legendary_jack_of_trades_guide.pdf
    • https://s3.amazonaws.com/niwotipugonuvoz/cuneiform_bone_broken.pdf
    • https://s3.amazonaws.com/votubukaxogilix/9791793553.pdf
    • https://s3.amazonaws.com/zuses/tamil_play_movies_2014.pdf
    • https://s3.amazonaws.com/xijalovelokolep/update_huawei_p10_plus_android_9.pdf
    • https://s3.amazonaws.com/vebisop/winscp_for_mac.pdf
    • https://s3.amazonaws.com/lovetijif/73258544316.pdf
    • https://s3.amazonaws.com/somamere/java_xml_parser_apache.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_off0000b2e4.bin
1c5fff435cc3af11e53fc053efc11066165546782fdbb5003a744b718f8ce46c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E4 5680 bytes
font_01_sfnt_off0000c619.bin
2f179870e3d9f537b52bce1888394c3bb65329f06392d124ca370ffe5af1172f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC619 9356 bytes

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