Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe17ac8b182dc05…

MALICIOUS

PDF

72.5 KB Created: 2021-05-08 04:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43521afed800bccd6e5a2a6bf0912c96 SHA-1: d19a538cde4ae0a73fc077ee1f334dd920a80b70 SHA-256: 4fe17ac8b182dc052a1392b6ea0e589382d5b30e6cc0d6d831c96744cdfc83f0
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains embedded URLs that likely lead to further malicious content, suggesting it acts as a lure for a phishing attack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/cddd6925f52728177cce9283eb942a7b/kinifivofepatajotalaz.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9cf4e3357---34673542317.pdf
    • http://accessprecision.com/userfiles/file/tetitujuja.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/9d1426a49e6942dc22a49c982b53df56/zalavipopezixabosejonuma.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802e027df3a---bitujizaxupop.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608990d901cfc---lukukivakiso.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/8abc6fff1a8a61e840386eb6592b4ecd/mupez.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606d25e094dae---70355637981.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8c37e6a3740cd7c78e779f2e14ba84d7/julikojumajigifivikinez.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/uhosnkml8rtndde3qjib1e14l1/wanin.pdf
    • https://alamansyria.com/userfiles/file/74522087361.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/e0084a67db1bf0dbd2be5da14752abc8/25013572553.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160726e8f6c766---96237333381.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/76553251916.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/260b6323a5008ed58ce79205ecb0f9ec/93056497552.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/a9eafe2569de5de99fba5c915cd00705/kadexevevowif.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/f72524796896498a2141286928e791f5/18960559371.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=auto+call+recorder+apps+free
    • 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_off0000de07.bin
c8313aada906b3ed507597d8564ee1f2f1c2a8f9261ad8c3a52e9eeec8cb075a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE07 5140 bytes
font_01_sfnt_off0000ef93.bin
742bb2b49b5b951325da190716d73a81fff2f5bc27eadce9ff82659e4a8da0a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 10632 bytes

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