Malicious PDF — malware analysis report

Static analysis result for SHA-256 1197d64125f3b6ba…

MALICIOUS

PDF

164.9 KB Created: 2021-07-02 10:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f3cb791e1a4d4f9ac2a8cdbe6a9e887 SHA-1: 7d7f1a7292b2416feb707d4e8ac2179c746afb67 SHA-256: 1197d64125f3b6bacbfee406edc5c68adf50e23d998451431f39e99770d62255
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous embedded URLs and the nature of the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

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 http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b249cbf1b28---luzikezaxejaxakivu.pdf
    • https://ilexgold.com/app/webroot/files/userfiles/files/78315202159.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce9aa5fe9a---bidesuwilobejifi.pdf
    • http://polishingmarblefloor.it/userfiles/files/46492521934.pdf
    • https://askisan.com/upload/ckfinder/files/91785436259.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/97193f5f42faa37b74a94bcf2f06d8ce/durelewopi.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160c180dcc2375---14402264062.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160729a837f6f8---padasulujogexedidus.pdf
    • http://parvazyab.net/basefile/api203/files/gorojuzifalugopowugix.pdf
    • https://www.alapan.org/fckimages/file/89123330312.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3059c2c4a---kopuwoz.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086c9939c977---puxugilawanedogugefaseri.pdf
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/petodupekatogoka.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f72c528566---nomedomi.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/8785urltm81tk16cpuu9u1bff2/94851217782.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8eb885bbe---fezudurolidepiw.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/segchoogarfshu9fd3g144g392/23551078260.pdf
    • http://minutemen-jrotc.com/clients/84940/File/teximizezerubopev.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a61015ee8f---sawiroxudakugixu.pdf
    • http://alpha-cp.com/userfiles/file/pulimakegot.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070b3ef9b20b---puvamewulimakufanef.pdf
    • http://kleinschaden.expert/userfiles/file/sawupamon.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/uk88094p7o2j3g6p59a139dgi6/61574776376.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=density+of+co2+gas+at+stp
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/3be73a57f07e682779b9afb2b8a70f74/dufiwibib.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_off00021dce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21DCE 16792 bytes
font_01_sfnt_off000235e5.bin
7c4d13676dfb21dc47022348bf9df15542ec2f9df39c2b04cc4c9bf7779a68bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x235E5 10744 bytes
font_02_sfnt_off00024eea.bin
dcf17f3aeca03e3168ab470eafa823c2524970c3db41508c31ac3d35f82a2263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24EEA 21744 bytes

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