Malicious PDF — malware analysis report

Static analysis result for SHA-256 b35b11e73b63b67d…

MALICIOUS

PDF

66.7 KB Created: 2021-05-06 03:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 100a125cde87d1b8337a928c527c40c1 SHA-1: dba36d8a2caffd577d652e7a2ad8105d0eb08e44 SHA-256: b35b11e73b63b67d53c96dabbc075cf290253f259248095fca622b8da4dc4ce9
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, one of which is flagged as benign but others point to suspicious PDF files hosted on various domains, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to a music artist, likely used as a lure.

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://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804f601716c---zupodesor.pdf
    • http://aarogyamedico.com/userfiles/file/bufixuponozudusiwug.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857d8033935---38756937573.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f48a06505---58733155146.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160892bdd2755b---kuxodoberodafoxuwup.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160775d7a480ca---vosuzewujutanivo.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/99827586caf03bf1f949d93a3681a11f/tomexezuzodevoji.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/s6eafkhqojdp7mkl5gjcse6o27/52429255971.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/a468e58012c7fef2871fca0631b59c79/lebaguwixuwelizerivaxe.pdf
    • http://amon-syotengai.com/userfiles/file/85205984543.pdf
    • http://afghansolar.com/userfiles/file/keretiwivofiwonoj.pdf
    • https://aravlicraft.com/cmsCart//upload/file/dezidaxatogikor.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160730d237d9aa---14382890988.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e91a5d69c---6222181251.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/188fe322b5a57817a42efdb23f80c7da/wozagilomobi.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607b32379a912---mewutotatimipi.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/cjlmsm48hk0ql5vtgfnuen8vic/vamekonelezaj.pdf
    • https://arvikabc.com/images/uploadedimages/file/91209594399.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160909dc70a6a3---gexevawodoxosanifigum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=capital+bra+album+berlin+lebt
    • 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_off0000cb0b.bin
7ea88403339dcac8c197a6cefb5d6572aa5c54da73eaa5014f62c3b743603f8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0B 4832 bytes
font_01_sfnt_off0000db55.bin
79b92fa160b9748e0d7f7d7054f92ed958ac031ec102a6a95c061bb30e97ae49		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB55 9708 bytes

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