Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee30b3a85c44f869…

MALICIOUS

PDF

89.7 KB Created: 2021-06-29 06:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1027e82c3272875e39b6bf110d8235db SHA-1: feb2bc65617f4dc11fbdafbbbec66ca2dabefe25 SHA-256: ee30b3a85c44f869e7f9eedbbcca80dfe613d2ee1b1256b0ce4f4f88b0904df4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malware or phishing content. The presence of a URL with 'download+assassin%27s+creed+valhalla+pc+torrent' indicates a lure for users seeking pirated software, a common tactic for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://krisoc.ru/uplcv?utm_term=download+assassin%27s+creed+valhalla+pc+torrent
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607994f6ac044---netekepogamaza.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739856db5d8---tawoworugame.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/fv04g1kh62ajrokg4cptskngu1/37434547116.pdf
    • http://luingpyrex.cz/foto/Image/file/48550207269.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b590c9706---milunogojifod.pdf
    • http://4seasonstours.in/userfiles/file/17437484748.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985830c1a0a---24999645262.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/98e7a04ea3ae5991788c94336ad8207d/61324239005.pdf
    • https://fablab808.com/nbloom/fckuploads/file/72536340067.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/7a40e8b37fbb3a8a4a55fcb958d81a9f/25413187491.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9e03138cd---44872408605.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160809e03c750b---81118211883.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/de66b8psvfgqa9rto3jmleknp1/33263480391.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/265716533f92778243b47c05a316cb2a/zivejowovinawimiramaroje.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077fa09d388e---juluwemukejunep.pdf
    • http://mispuntossaga.com/campannas/file/83872706670.pdf
    • https://menlopark.com/wysiwygfiles/file/30330321492.pdf
    • http://mobilenmr.com/files/files/powif.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a06a563774---68914219202.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bac7cac23---3588024176.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d6f887cf130---59451716095.pdf
    • http://asupuro.com/user_data/image//file/wuxifovodugujow.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98f333c07d---kedamaxudibafumufuwenila.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/ecqvavkt346i1veh9jo950tipb/rasalepekabuzasogagedu.pdf
    • http://msslink.ru/userfiles/files/23493226954.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_off0000f770.bin
ecce7b31536a40b46b631a221a4477bb229bf6559b5e46b8e1de389dde928c83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF770 18100 bytes
font_01_sfnt_off0001268a.bin
825c7b72c420cb1de15681e85a587b82f2843defff8d03b1cd7111f1c5253c74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1268A 10796 bytes
font_02_sfnt_off00013f79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F79 16792 bytes

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