Malicious PDF — malware analysis report

Static analysis result for SHA-256 dace54b6cfbf230a…

MALICIOUS

PDF

93.7 KB Created: 2021-07-23 17:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cc92aaa354ff53cd9dc955ac9d086069 SHA-1: 8621c570695a840680367ee13e3531ad81e156a4 SHA-256: dace54b6cfbf230a18fb1d7875eec0422c0f0a83f6a10c5f8cf64d498f1c47f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of these links and the overall structure indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/32886239ae6e2e5e5b059a25472b5f74/gapuke.pdf
    • https://proxus.nl/file/2655324121.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44bc558597---3467084828.pdf
    • http://kimkhimientrung.com/uploads/image/files/35327537242.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085910055655---83850817777.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/4rmu47pmpuq9l49lrq0h6aiq23/vebamirabaduva.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5877953137---gudugokizule.pdf
    • https://ceral.pl/ceral/pliki/file/lexigu.pdf
    • http://fairmonteast1975.com/clients/0/01/014dde3c838f86fef2ac1d31a86c415b/File/jozedenoxemeluvikadule.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/801cap7l40vs11vgmnc2i25s5k/xidixojalewinitogibaval.pdf
    • https://sindonis.com/userfiles/file/71840530784.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/bbf7ed39c271188db50ba20c22b9da78/zigujeligerudutenodix.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/b61735f1d2ac39d97fc0bf581a975096/kezukilugekakifimegev.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609a0d2101e25---64790481852.pdf
    • http://silesiacapital.eu/data/file/20344808655.pdf
    • http://metaglas.kr/userData/board/file/jaragidipiponorilemepeji.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/3f3ac6d2905f8a6340286963c0bfc3ad/wajuponowemotebeg.pdf
    • http://le383.com/uploads/files/linozevanekaxipilinupozin.pdf
    • https://amatnieks.com/pictures/image/mavepuxedekegav.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/af411e369f938923ea8048880b78da30/kitifizimaliwibetiw.pdf
    • http://immobilieninvestors.de/userfiles/file/mamakijadotogovusokedudu.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9314af3d3---10079800591.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f96a9e4a96---jodujunexukufedejeda.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608aad20f39e6---86488672246.pdf
    • https://energooptima.hu/upload/File/86041733104.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/a78la0u8fuac4i0jkmh0601jde/34551790978.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a4b54f10e---kogijojovus.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=what+is+the+best+character+creator+game
    • 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_off00010797.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10797 16792 bytes
font_01_sfnt_off00011fa9.bin
fd2229ec511d4c164fe90f007681fb272b2071743a42e5c7fd7cd2462eda9e8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA9 17816 bytes
font_02_sfnt_off00014eb1.bin
65abe0738e003952db04a7e27a073e714813b545b37142ac5eb90d690fdd72ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14EB1 10660 bytes

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