Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab68cc85794e08d…

MALICIOUS

PDF

91.5 KB Created: 2021-08-23 14:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af15bec0c7fcb549e27f2d15d9361e68 SHA-1: 9b61547c5a7135008a7ecb096d4c9aa68289548f SHA-256: 2ab68cc85794e08d119e20facf79a118a4238d49b235572a222f165d48edcef8
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, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/aqd86ne1ce0542256adrs27g2u/voneraku.pdf
    • https://ludifrance.fr/userfiles/file/winutowuna.pdf
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/p0ikuqei9ic7cvp95psktoqba5/betidarosogarojuredulupo.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16095644cbe0e6---48612091199.pdf
    • https://ovalpolycoats.com/media/89685857913.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/6ca5137af1827154156d4a75195f4f4c/43338050988.pdf
    • https://actorconseil.com/files/file/sowodozaduvegomubis.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6b6cef13f---50316407293.pdf
    • http://digifast.cz/userfiles/87303381217.pdf
    • http://pnmanagementsolutions.in/uploads/sikeferezataluzogabadofi.pdf
    • http://mileschapelcme.org/clients/9/9b/9b85db73e8c1d5ae3bc18b6db4f26039/File/25998246032.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/s51s4cg4fa2ccv5patic7jpuu6/83450434250.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d82ada51679---tasef.pdf
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/razolunizupitujukeb.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/7628b8d433526c9e4c8a5ff1f07f4d0a/50283791170.pdf
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/15874646343.pdf
    • http://axwelindia.com/uploads/sifarajoripepojike.pdf
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/83506685478.pdf
    • http://lysfyyy.com/upload/files/61571233194.pdf
    • http://abwgulfport.com/uploads/files/pewomusebimemuf.pdf
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/49983301086.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a41b5f6c2---kagusitus.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=what+happens+when+you+eat+a+golden+apple+in+minecraft
    • 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_off0000f5db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DB 16792 bytes
font_01_sfnt_off00010df2.bin
27430630fcd3829232b894c8dd91579e984a8b298669538c6411d9e2528d8870
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF2 11360 bytes
font_02_sfnt_off00012858.bin
b1887a0d6bd76c56ff19764a7efabd3f5581f242e9ed782731e5f0aab74873e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12858 22144 bytes