Malicious PDF — malware analysis report

Static analysis result for SHA-256 326b6f07461b854c…

MALICIOUS

PDF

85.4 KB Created: 2021-07-21 00:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fc6991c27279c1308680e2275c3ae894 SHA-1: 45c7d433611f210613e59a15eef4e51e485803d0 SHA-256: 326b6f07461b854ce4c6749155dd3eadb87c3a8fa8334c53d06f5a64f27377e2
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to unknown or potentially compromised domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://lhs75aa.org/clients/0/08/08eb77d093c5251d787cf05842b4a73c/File/ganeral.pdf
    • http://goteneplast.se/files/images/file/refitalamibemekug.pdf
    • http://apsencollege.org/test/fckeditor/file/zazuki.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096cbd1996d8---71580788131.pdf
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25793803041.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082bb3571d81---63802678612.pdf
    • https://menu2uplus.com/images/file/68228230235.pdf
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/19742509052.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a48dea41d69---mifezot.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/da1a7cdce953253958b27a9061e9c830/23954291893.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b88a2f996---govepeguvogudisotov.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40242c15b4---29954966788.pdf
    • http://accessiblevehicleservices.com/userfiles/file/41686341749.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/r3a27hios29tvlmu8qs89us8n0/tusuxikirotagiloliwu.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2007754fe---wesomigakuremekig.pdf
    • https://eastmanllc.net/ckfinder/userfiles/files/43121943500.pdf
    • http://chalappuram.com/userfiles/file/54888368706.pdf
    • http://clair-environnement.eu/catalogue_dynamique/file/24008137866.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607cccfd3236a---83985771750.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/1901912806a8a6b381f1ce0099b9082a/9184403712.pdf
    • http://aarogyamedico.com/userfiles/file/90286498997.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/c55dafd319482ca01a8432a360a60802/towubodiben.pdf
    • http://nowyhotelik.pl/userfiles/file/zewepojofubidexopet.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=bilateral+renal+cysts
    • 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_off0000eba9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA9 16792 bytes
font_01_sfnt_off000103bb.bin
acb2ae354a439141870b040cdc9cd11d0f9f8d5be7b3e01c15b541edb930530a
pdf-font-stream PDF embedded font (sfnt) at offset 0x103BB 17780 bytes
font_02_sfnt_off0001316a.bin
53c60b29494adf0539083ee7f0cfd6b18acafde1f4e40ff21fc1ac092f170e9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1316A 10268 bytes