Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0e9b41d1fbfb10…

MALICIOUS

PDF

80.7 KB Created: 2021-09-04 07:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 97df2c44ae304813450696d72fc8fbcf SHA-1: 9fa3204835b2cd24fd0cdb1a5efc1b54f8bf42d6 SHA-256: ce0e9b41d1fbfb10d0a6ec5f1835faa541d2d71cfbf3c9c7ee89f3235f71f848
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a link farm, a common technique for distributing malicious content. The heuristics indicate that many links point to potentially compromised WordPress sites, suggesting an attempt to lure users to malicious destinations. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/94661262aba81cddb96ab6bdd0806ef2/12186655953.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/mmj6b37q0itt7eo1qp5ti8mrua/fujijesuxud.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/e77e43b0a6e5a33d1b56eba111b8af16/85410395151.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117d9fb29ce3---vitijowefulasizux.pdf
    • http://ergo-logo-bamberg.de/userfiles/file/59027482593.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2613e4472---63173882574.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/71b8b2148f8d9cbd389f7d518b632b99/vifiduk.pdf
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/foledaruwadeve.pdf
    • http://kasargod.net/uploads/file/soledixiwelitowage.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/17b7fd1d61fdf6430c53de1752f228df/latok.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608108a27bf70---fajozefobazat.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/b46ispj1i3tafemdi1gvdh04lu/55191596053.pdf
    • http://taxilitomerice.cz/ckfinder/userfiles/files/timaxufuwejuxid.pdf
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/risovajulizuxitogo.pdf
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/gawawilisunidebepem.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/moan708tsluus0915hrkrko022/suwuzev.pdf
    • http://hangquangauto.com/files/64484160671.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/7836c7873fed53bdeac5b2f1066d24e0/22373193721.pdf
    • http://sushikyototogo.com/uploads/files/79110223352.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/4778c834cd1126e354d62637f83b2975/21739332314.pdf
    • http://okfilm.kr/userData/board/file/35327460590.pdf
    • http://ufnk.fr/app/webroot/files/file/kesafobuvewuwiboz.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070953760bbc---jalejebujomumatisoxotivi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=human+resources+manager+job+description+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_off0000d781.bin
acd231b970570e7d815a3c0a0444c032ec8b21b41ee0a4cd89c0e0c103dfc32d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD781 17008 bytes
font_01_sfnt_off0001030c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1030C 16792 bytes
font_02_sfnt_off00011b23.bin
8a09100113c73dda437c32b61c24116ddbe35dd4fe4532ec5334881f3add9874
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B23 11280 bytes