Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ed2570b30f0d824…

MALICIOUS

PDF

101.8 KB Created: 2021-07-16 16:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9de06a8d7c8c7ca7ef2fc9448c2a16f4 SHA-1: 2e6b29ec62bcbcd08a90045bfe7b3ff21daf8fed SHA-256: 2ed2570b30f0d824c3064ff281fa009e7dd5c267ff299c54b8c1ded41a63a1dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs and link farm structure are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9787

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://smidgel.ru/uplcv?utm_term=rome+crypts+and+catacombs
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/0a1f61210370edfb3d887f3b557be264/wipomixezevuxawaluvizaxu.pdf
    • http://php-lounge.de/userfiles/file/vamedekifumi.pdf
    • http://ekolojikweb.net/upld/userfiles/file/kesekujiwizaxesujane.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/025d2e868aa2188bd78a88dd4dc750c3/sodotorasapusobejuvaxix.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb8d8bdc2f---solalovaxeremozadebux.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d8a131ee8---jimazexobuvesetanivejene.pdf
    • http://marty-triple-m.ch/inhalt/files/69574801238.pdf
    • http://wabasnb.com/files/fckeditor/file/189845917260d705db662d9.pdf
    • https://atraba-holding.com/userfiles/file/43035216773.pdf
    • http://moestuinwebshop.nl/userfiles/file/nivupig.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/42ce24728f33f02401790f638fa0c910/tafilozud.pdf
    • http://www.sec-ollivier-associes.fr/www/upload/file/68199772133.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd65ab4a34---kebofolago.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/5598447099026b355c61f3f080a61baf/73501050761.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e065b9452---47402549366.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d23be9502---80048140474.pdf
    • http://www.bluewhaleline.com/image/upload/File/70050995063.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b448bd0b74---bopadidoduwewiwas.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090abbe4a30b---jadizixoduvoluloxisej.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858a815dc1a---sasonemexeluzir.pdf
    • https://299-45.com/CKEdit/upload/files/riwonunomuxazaxi.pdf
    • https://koffiewarenhuis.nl/app/webroot/files/userfiles/files/49082651689.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8b8948fb6---fixevimufozirajopalogewoz.pdf
    • https://lawina-radom.pl/files/file/50831726113.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/9ab57be3436a3620941fee0258e1284f/lavugenigarojuti.pdf
    • http://sys-svinding.dk/userfiles/file/7075993148.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/vam5lml0uuj5d4060avj78s100/ripese.pdf
    • https://gobelsprofil.com/upload/files/49025497460.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_off00012935.bin
ea1cdcd43c2d51d7ad4467d516f4c24d520592d30f8b027e00f7c25f195743ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12935 18336 bytes
font_01_sfnt_off000158da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158DA 16792 bytes
font_02_sfnt_off000170f1.bin
7a37de55056e3f06f58d928a4ba6d8431cfbcc544c49685c1e587a63c85ca199		 pdf-font-stream PDF embedded font (sfnt) at offset 0x170F1 10836 bytes

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