Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac5684ed0047acb…

MALICIOUS

PDF

106.4 KB Created: 2021-03-04 07:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4395a5fc865cc1fc5c47a0ca8bf2a91 SHA-1: 2bb0a911c424bcb24e56f7f3e3f37ac9cb6bec05 SHA-256: 5ac5684ed0047acb30b78d03e81d6bb00684bde99e3c1b6cd54586fae2c28f4c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that mimics a search result for a textbook, likely as a lure. ClamAV and ML classifiers have identified this file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the presence of external URIs suggests a potential for downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=fundamentals+of+cost+accounting+5th+edition+pdf+free
    • https://cdn.sqhk.co/kukisigafumi/hghjdii/natchitoches_hope_for_paws_phone_number.pdf
    • http://xisumagogali.getenjoyment.net/79659009771.pdf
    • http://fito4ka.xyz/wabapilawushlejp.pdf
    • https://cdn.sqhk.co/toromerepowa/8ihjcLN/6423720360.pdf
    • http://qwert-ita.fun/28191935051vffw2.pdf
    • http://vofufime.mypressonline.com/35148242153.pdf
    • https://cdn.sqhk.co/jojikoxazew/ijjaQgf/real_football_games_2012.pdf
    • http://help-lnstagram-verifycopyrgiht.com/dexajomosipekaduxorox1uns5.pdf
    • https://cdn.sqhk.co/nodujugebi/gQNgfif/photo_editor_pro_2020.pdf
    • https://cdn.sqhk.co/wifopuzuxiba/hbQYwXO/japanese_auto_spare_parts.pdf
    • http://gubuxuk.scienceontheweb.net/how_much_does_comcast_charge_for_cable_box.pdf
    • http://nncucuucuc.space/135965503883iozx.pdf
    • https://cdn.sqhk.co/wugotiparo/33jegfQ/suer_toss_the_turtle_online.pdf
    • https://cdn.sqhk.co/dogilijesiwu/eKhbXWd/arcade_game_skee_ball.pdf
    • http://avit0.cc/vuwaboxiccw6y.pdf
    • http://fukuzowi.sportsontheweb.net/altered_carbon_book_vs_show_season_2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://dapufojutujat.atwebpages.com/54366432710.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001558f.bin
6570f625161f7b71be4f44ab27028b4b211b5ff9a37a434feba53cbd5d4736e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1558F 5528 bytes
font_01_sfnt_off00016833.bin
1f7db97a57addbc9be8b3583697ea1f93eb5be936269cc697e17a05386e0228a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16833 11020 bytes
font_02_sfnt_off00018d4f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18D4F 4324 bytes

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