Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcada2bb399600b7…

MALICIOUS

PDF

121.4 KB Created: 2021-06-26 16:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be7308b01dd7f7d391f72ac26d39247d SHA-1: a2e5ba334a0f8c2fc5000450228fef80a4624f22 SHA-256: dcada2bb399600b7ce13d1b82cf2072da46e71e7c019914f89c1ddddd3a5f305
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload. No scripts were extracted, but the structure and URL analysis point to a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9858

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://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/i5c2hgb0cpp9nh3cp0j4dq9i67/zagalumoxik.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee5e90974f---50905352361.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dbdb3daeb---fuxeru.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16096c3b3f313f---60420243181.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/44b7mu6vu27edj55j0fjqgkt1c/kagaluvegebekalijorakatiz.pdf
    • http://www.hmh.sk/files/articles/file/43345299580.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076457e4a22f---xazowudizofipe.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16073a80f91ddb---87972633106.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/hrb44f03p9cat3i49qbpplgpqf/gigimofagozisaja.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00eb2183d2---woburetos.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2bf4af77a---bewerizabogarejonu.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/53a4866706737c2216d19d96b0dacc0d/37565449574.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fa6295de6---zomuxopototevorep.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f3aef39a8---roguli.pdf
    • http://onestudent.dk/userfiles/file/xilizexafoxalifatuw.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/98944238d7b62c070a28d0a3bfb54132/wetupadexopaxoror.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abca2a59a8e---78751796740.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/r2u4cfv3cqd711ko5203nstqtl/wuvukewegi.pdf
    • http://chinahongji.com/d/files/47392715856.pdf
    • http://albino-pitti.com/pub_img/file/83812330298.pdf
    • http://edwindijk.nl/home/edijk/domains/edwindijk.nl/public_html/uploads/file/xekajopupumolo.pdf
    • http://duocmyphamcongty.com/app/webroot/uploads/files/rubiju.pdf
    • http://yourtruck.be/upload/ckeditor/file/19219962845.pdf
    • http://vom-ragnaroek.de/uploads/file/viredexenedanugevinigak.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/ons1tmo1h75n5g3476mra6t33c/36988913467.pdf
    • https://blindnow.com/userfiles/file/93483375565.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=all+is+well+that+ends+well
    • 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_off00017bae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17BAE 16792 bytes
font_01_sfnt_off000193c5.bin
a5549acef21a6c0480e89f056b34d55956b4b54128d75f54570d7daae34966ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x193C5 10192 bytes
font_02_sfnt_off0001aa9f.bin
56227ddaabf7426ed03f444baa506c1e7ee8aa474596eaebbcfeff910700dc4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA9F 17540 bytes

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