Malicious PDF — malware analysis report

Static analysis result for SHA-256 392bed9f6fd8aa86…

MALICIOUS

PDF

80.0 KB Created: 2021-03-02 01:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df5c28d558a4ae28ce5317727ae58299 SHA-1: b62fc669310af75da0af25778b93a8823105b9e5 SHA-256: 392bed9f6fd8aa8633b9950dd8320161e9997c9ff07e2f8e9bfc47ace059eca9
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, specifically identified as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely intended to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to obtaining a club card, aligning with phishing tactics.

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://vilenefex.ru/strik?utm_term=how+to+get+a+safeway+club+card
    • https://cdn-cms.f-static.net/uploads/4393369/normal_601d33a13606b.pdf
    • https://cdn.sqhk.co/jasurisunav/ieiiIhb/xusegokafixuwedokigu.pdf
    • https://cdn-cms.f-static.net/uploads/4445749/normal_5fd8077a86fdb.pdf
    • https://cdn-cms.f-static.net/uploads/4462379/normal_5fd9a05a5c6b6.pdf
    • https://cdn.sqhk.co/madufuxenuw/CgeMlgd/good_money_makers_osrs.pdf
    • https://cdn.sqhk.co/wevemugas/jghfhbU/rupabefixoma.pdf
    • https://cdn.sqhk.co/gegefemorosu/jiinGBm/70360742232.pdf
    • https://cdn.sqhk.co/muzexeragod/jDgjyit/police_siren_noise_free_download.pdf
    • https://static.s123-cdn-static.com/uploads/4456663/normal_5ff75b7e9b82c.pdf
    • https://cdn-cms.f-static.net/uploads/4448547/normal_601f93ee3ae3b.pdf
    • https://static.s123-cdn-static.com/uploads/4444874/normal_5ffe1b7fe9f7b.pdf
    • https://static.s123-cdn-static.com/uploads/4418185/normal_6007a35c30a02.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/retobifulipo/wewimag.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_off0000e4d1.bin
b2fbf22517674db248d2af117d53066e213eb425d84e5f68b17210985627a3d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 5484 bytes
font_01_sfnt_off0000f7a1.bin
bbab625bc5bf1c49b914d1bba3e79285ffd638e9dac93b63c7534df4628c665a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A1 11060 bytes
font_02_sfnt_off00011daf.bin
c2f1b8e27e4c5d1eb6694bcf999bed56489d599ed66a9b176e3ad865fa2ee921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAF 16232 bytes

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