Malicious PDF — malware analysis report

Static analysis result for SHA-256 c216006a704aadc8…

MALICIOUS

PDF

96.9 KB Created: 2021-06-24 00:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0d797111338baac1ca11225f8be7050 SHA-1: 6f49a8464488dc8fe3a3ce52d05ae8ba8cce347a SHA-256: c216006a704aadc89f7b8796e9561b511562568e23e261a6f88651fedda6885a
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, identified by the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly indicate malicious intent. These links likely serve as a distribution mechanism for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/buvezotitupeluteko.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726cbbc1c06---zanetan.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d524a90bf---63076315195.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ugb5igqjujiefc0a1dke4utkv5/vuvevupolom.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16072890e41e4b---21736822373.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875e47a1d78---78221071989.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f72fc8e165.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c3402599ea2---jisafamizilagupelen.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7007ef66a---gasozusokekax.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/a82d8763dd7b7321da218d5750b8d6e8/furelexevaxevofegonojef.pdf
    • http://painttechvina.com/webroot/img/files/15852213896.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d2c20c3c9---sogenupipenevibibamuzeze.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/3ded9fd19932c866e748d1fd73917545/47695730475.pdf
    • http://charivne.info/images/file/ditasezanogatetonenisuti.pdf
    • http://brkvinc.com/userfiles/file/11078867235.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c47e8f14be1---78646431921.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=lpotl+episode+guide
    • 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_off00014274.bin
34b8be4b8c77dbb27dd1d415f54a2e6924aec732615cd3ba79e1a97582685226		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14274 4760 bytes
font_01_sfnt_off000152c0.bin
af588dc96a54642d1b38a158068d1b94ce7d0dde2bac3c7a23e15e2dab565a20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152C0 10720 bytes

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