Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c70b72c4e3be74…

MALICIOUS

PDF

75.5 KB Created: 2021-06-12 23:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62c38c25e6256bfa830b353d6c4e8dc7 SHA-1: 454224059e2fb2ea12a59e87bc41e60e2ebcccfa SHA-256: 00c70b72c4e3be74b8870660d7ca8d5dd2dddfb68d73d1a8df509955aa421d7a
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://inwebjor.ru/uplcv?utm_term=zyxem+para+que+serve
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16088861b9d121---woditoj.pdf
    • https://b2cexpressdemo.com/userfiles/file/92320747600.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16071b460bca13---gofisizelabotomijenolibol.pdf
    • http://panteres.com/files/files/57397957464.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/oi3mcjaa71b7fe814adshnosam/poxuse.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afde26afea3---gugamilesililinuj.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/g8r7h84uhunj116jtl66p74jk1/luwoli.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/q7dmvuqglb1kbtcij8ne9tn445/31265273025.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b35d0ade06a---mubafoz.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/sgt1cqon62t7ivvp7culjoqike/11033005929.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/foggscgie2t6ke7qsuf6ucbjc2/2993501633.pdf
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/wizojebudilewav.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/14ee832c863fe4c71ed31a9200fb4bb1/26695175440.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/fa35a99863830b61a5fd00faff814e3c/37180020438.pdf
    • https://amrapalispot.com/userfiles/file/75603704562.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160789f7890cca---luzirozulakego.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/a24r8c5bo54408ifhrd8nhnv8m/45877575296.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000e6fa.bin
f75bec6816269cf8f785b96ed97bc2880e82afc9fa5cc2402fd8b4bbe0337673		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FA 5244 bytes
font_01_sfnt_off0000f8cd.bin
2838ce6b70759e95ca29d8b955ab284afd022ff24faf00c5f0f456abe34bd233		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CD 12212 bytes

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