Malicious PDF — malware analysis report

Static analysis result for SHA-256 204f6c345362bec2…

MALICIOUS

PDF

86.0 KB Created: 2021-09-03 13:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 39375810b3944a23b85b4889791a0b43 SHA-1: fc3d7644d74bed25c75b5df4eb396a8cbd65d8c5 SHA-256: 204f6c345362bec281f8b5b7ae4d7152091144a19982a828ea0ccb2c7a3c04ca
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised websites and disposable hosting, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The file's structure and numerous external links align with techniques used to obscure the ultimate destination of malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 https://drafthe.ru/uplcv?utm_term=election+of+1824+and+1828+worksheet
    • https://www.tvmreza.tv/ckfinder/userfiles/files/wexesamagoke.pdf
    • https://demircanticaret.com/userfiles/file/nakane.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8600d826e---nojemakomuwokajagepovapam.pdf
    • http://volamtuyetthe.com/userfiles/file/43905097556.pdf
    • https://sasalidayanisma.org/uploads/file/vajelalubedolutunirid.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/n3kpk3s9m2huah5vs8rn5m0g8s/notikiwiminaboruwa.pdf
    • http://cgl.lu/userfiles/files/62069096371.pdf
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/fevonoted.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126ecce280e3---70199573778.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed0f23fb6c---17966499991.pdf
    • http://aweibel.com/Photo/file/vipid.pdf
    • http://atomiccm.com/userfiles/files/96313709616.pdf
    • http://nature-revive.org/files/file/74499103226.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92b93ec1f2---20297973225.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/ligofabosebefasakoziku.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/494e55ad42279134f1904b0c7605de6f/wunilojupibudalul.pdf
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/mosubekawizajirozufasokam.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709097c4080---98611466856.pdf
    • https://tdsns.ru/userfiles/file/52823283081.pdf
    • https://puntoagricoltura.it/file/xigoba.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38b1d5b652---nokixe.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982e304e328---gelige.pdf
    • http://npi-management.com/ressource/site-image/files/7051232785.pdf
    • https://rosenstein.lu/userfiles/files/xopuxizosifififejud.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/msr97fd4gv7849ug1k1o135nbh/dumavakumuduzadola.pdf
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/97a8d26bbade8105afdc59aa976b801d/77524806956.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://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_off0000e961.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE961 16792 bytes
font_01_sfnt_off00010178.bin
da2e726ee3f5212898ba57767dbe4e0a942f245c7cf98ecae98bf2dff54925de
pdf-font-stream PDF embedded font (sfnt) at offset 0x10178 11192 bytes
font_02_sfnt_off00011bce.bin
61da22d22e0592f51a5e41eb5dcfa3c7aa79452d4266bab04b7a73c957a3a50c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCE 18008 bytes