Malicious PDF — malware analysis report

Static analysis result for SHA-256 314178831f6e380a…

MALICIOUS

PDF

75.0 KB Created: 2021-09-18 03:35:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 33f122f7f83e9c8f918f0846fdffea47 SHA-1: a0b21a99c84d55e982bfd4168c1dd5ae0ac8e537 SHA-256: 314178831f6e380a579103f2bcc9f64fb2077c97b6116fa6ead38dbd76c4eec1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to distribute further malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=neha+kakkar+songs+free+download+mp4
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/wufimaveredavo.pdf
    • https://www.pu-sk.com/app/templates/js/ckfinder/userfiles/files/79401776815.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf849e7f71---19436330494.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/d9873e31bbf5d3be081f4da771b48630/notexamajisunavexitadiga.pdf
    • http://conhantaoankhanh.com/webroot/img/files/49983358871.pdf
    • http://rayanchem.com/d/files/zuvixoliwujakuwawejer.pdf
    • http://teleinwestor.com/userfiles/file/71367683627.pdf
    • http://slmj8.com/data/userfiles/files/72254536497.pdf
    • http://gagutp.com/sa_upload/userfiles/file/20210907080815.pdf
    • https://diphong.com/uploads/42472300457.pdf
    • http://mnwebdesign.dk/userfiles/file/gimedoginisa.pdf
    • http://ecofincas.net/ckfinder/userfiles/files/duloso.pdf
    • https://medbillings.us/lightspeedweb1/file/kemitesiruvo.pdf
    • https://optimuselearningschool.aels.edu/learning/site/images/uploadfiles/buragapefonadipagupokames.pdf
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/dovebev.pdf
    • https://mmagame.com/userfiles/file/lugusuxalaposataweto.pdf
    • http://schodylux.pl/userfiles/file/vujuni.pdf
    • http://mlsconsulting.net/cms/files/File/jizipetu.pdf
    • https://ozora.schaffsen.com/contents/file/34297807897.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/5ba4531542ed22d13acc74ede883f26d/9339894671.pdf
    • http://fujavietnam.com/images/Download/teginujapijel.pdf
    • https://mmagame.com/userfiles/file/notitimure.pdf
    • http://diagnosticaedilizia.com/userfiles/files/ludefi.pdf
    • https://ginniglobal.com/uploads/file/82414907027.pdf
    • https://rt9.rspo.org/ckfinder/userfiles/files/pikabijevug.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://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_off0000bf90.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF90 16792 bytes
font_01_sfnt_off0000d7a7.bin
669aa120a1944c2829587ff7739838f95bf3c91cc117d5a939d1226f1e3d6cc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A7 10988 bytes
font_02_sfnt_off0000f0e1.bin
1c1e5c043d193965345a5bae246986a7e275afb6ca9ae15a531370f633e37e4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E1 17372 bytes

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