Malicious PDF — malware analysis report

Static analysis result for SHA-256 69fe096f012c8a64…

MALICIOUS

PDF

70.8 KB Created: 2021-06-22 19:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb9b959c61d1bdb3761639191f746a5a SHA-1: 3aaa5c13634286201ae6f473b6fb7e0ac49176d4 SHA-256: 69fe096f012c8a641fbce7bbe800a690188f1aa294653a9dabb7b99fb01cdb90
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting an attempt to distribute further malicious content or phish users. The document body is heavily obfuscated, but the presence of embedded URLs and the overall heuristic findings strongly suggest a malicious intent to redirect users to attacker-controlled sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://debden.org/userfiles/file/fezegapafazuvusurinelita.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16088a01f2a820---76596781250.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/fde9553683d5c7ce51362e1352eef97b/teteraruti.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098c47baa022---fazafojomagavudozupur.pdf
    • http://smartvoicecom.com/userfiles/17851499623.pdf
    • http://russkiivopros.com/images/FCKeditor/file/94996536390.pdf
    • http://urbanconstructions.org/images/uploadedimages/file/84908982630.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb60e724f9---fuzupefe.pdf
    • http://php-lounge.de/userfiles/file/62472142709.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a73f026d5---jajisemema.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a8270b419---57194377788.pdf
    • http://anhuifan.com/upload_fck/file/2021-6-20/20210620215149465531.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/7759abc4ebd4df176334557327d36678/43985912493.pdf
    • https://majorsagilekvaros.hu/uploads/file/57227094072.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8bd6cd085---womebudux.pdf
    • https://bestrecycledautoparts.net/images_i/file/tixotemudumumatukubu.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b340b741056---39839988226.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=electrical+emergency+plan+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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6d2.bin
99a0e1a164e6240738651d36142c3b589c89e160bae681ffd746d72935ab2cfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D2 5356 bytes
font_01_sfnt_off0000e903.bin
ff7b6fe0e824b07e33c3f0af47808087008f13488473c5855f610e62a050f183		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE903 10856 bytes

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