Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd0a37f81139443…

MALICIOUS

PDF

76.3 KB Created: 2020-12-28 18:10:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b45808495d67769d8fc921e74bfae07 SHA-1: d251bde6db321502b3dfb456abdfd1d37bcf600b SHA-256: 9dd0a37f811394435682ef80e185c4a5ceb2bfae3b49fce097da3e29098c994d
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 'traffnew.ru', which is likely a malicious domain used to serve a second-stage payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to downloading wallpapers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/strik?utm_term=download+wallpapers+for+gamers+4k
    • https://static.s123-cdn-static.com/uploads/4465907/normal_5fe2a7c0e9ca3.pdf
    • https://cdn-cms.f-static.net/uploads/4402948/normal_5fe928737076e.pdf
    • https://cdn.sqhk.co/wemonamo/h4zcShj/8693709205.pdf
    • https://cdn.sqhk.co/mofosalamo/igdgeSX/trauma_first_aid_training_near_me.pdf
    • https://cdn-cms.f-static.net/uploads/4379220/normal_5f9414c3201aa.pdf
    • https://cdn.sqhk.co/vumivatuvi/Fugficw/foxided.pdf
    • https://cdn-cms.f-static.net/uploads/4382197/normal_5fba41c3a96a8.pdf
    • https://cdn.sqhk.co/xakatikakizi/sjcCXif/world_war_z_game_steam_release.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jedobufudajewu/checkbox_change_listener_android_kotlin.pdf
    • https://s3.amazonaws.com/jozetej/10876921777.pdf
    • https://s3.amazonaws.com/lebejos/lubamiman.pdf
    • https://s3.amazonaws.com/xufujofaleki/kofetatewomaremagabudafe.pdf
    • https://s3.amazonaws.com/toliwudalamem/zuvekomogedewujifan.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4a4.bin
f920a40a420cf884ba7a037f95cc1d649299908ede50030e2957bb5447e6917a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A4 5604 bytes
font_01_sfnt_off0000e7cb.bin
b3e467b880bdb61144c04f49753667e6003cd7e9e1d6a7a5ac1d1739fe7f51d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CB 12120 bytes
font_02_sfnt_off00010f30.bin
3afbc95f4a2677bf4c8b77bd7df62e4dbeb651db4b5e482cf97b58e472170d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F30 16164 bytes

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