Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c68599d2a9bb1f…

MALICIOUS

PDF

86.0 KB Created: 2021-06-28 18:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01e9319718729b0a47ebcdef90c7c7fe SHA-1: 324b43efb8a66b7c884c9392bffae0ad11fb3d29 SHA-256: 04c68599d2a9bb1f752455a496b0c4e1fc36fe28f93c23017e47cefb31691472
156 Risk Score

Malware Insights

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

This PDF file contains a link farm, directing users to multiple external websites. Several of these URLs point to compromised CMS upload storage, indicating a potential distribution point for malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://candientushinko.com/images/file/panikedeb.pdf
    • http://barrybusiness-crm.com/ressource/devis-photo/files/gedebegivekevewib.pdf
    • https://tort-art.ru/userfiles/file/kawaviwekunusimodarager.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c32a5cad6---15171924820.pdf
    • https://majorsagilekvaros.hu/uploads/file/bavupuzadoredozekog.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1bd83a6a3a---tezowasuzisenexa.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/c8b880a22f233169d83c71b4deae021e/13905489104.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47dbf2bff9---zuvunixizakir.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/f252a6ad5c9c4db240a8ed63691ebf4b/zirafumaxovusetaxa.pdf
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/sujonofufisesaruronir.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609d88b85bc02---podimubedoboje.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/37249d820dbf6284a7dfa5529c0b7a4a/werixi.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608f58c235d55---xuxobizeberakusupajorob.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/b634236aeefa61624b7069fd09137ff4/fiverefuzuwofepolobi.pdf
    • http://pamat.ro/UserFiles/file/51489021826.pdf
    • http://icsbc.ru/fuploader//file/79349739446.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58d99c3f63---49126004154.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97315065ca---99566934655.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607247745fd8a---kamujesezukivawemife.pdf
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/fpvqu9124djpdp1gtdq2do9p82/xepotupevuxadesalunigibi.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b06342c0a7---labojufulamesiwo.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7c262002a---wibugoxamiwafeki.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/28b10b834caa2cfc9d4c160b4b96c3f0/59467107000.pdf
    • https://coil.hk/upload/files/kexaxinuzodobolumazis.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=kelly+clarkson+josh+groban+all+i+ask+of+you
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d345.bin
27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD345 16160 bytes
font_01_sfnt_off0000e8be.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BE 16792 bytes
font_02_sfnt_off000100d0.bin
aa68712ef30705a8e06748649625a360096eb980f7bfc70e749aad35c843eb1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D0 17816 bytes
font_03_sfnt_off00012e69.bin
f4376947457d745c74b30aeda7991322705fde7ada1db6ad509dd490ef94db39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E69 11084 bytes

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