Malicious PDF — malware analysis report

Static analysis result for SHA-256 8241290b2df55ae8…

MALICIOUS

PDF

76.3 KB Created: 2021-07-06 21:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1082ad9aac0b6d55b5f336edada3a5fb SHA-1: 9274207d4815c277b7d6a740ac8e2ba8a50d67e7 SHA-256: 8241290b2df55ae8ea35de6d4ac8b72cc703c71110a1286ed87bb3eed0b49fcc
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or exploits, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/a3e77106b007ce4fa2df27af3032d6f2/60292719116.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6738411bf---porosoranekofu.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/16a0408482d2035b76ceaa111c6e913c/6679058636.pdf
    • http://versobrokers.eu/userfiles/files/narumasepugufugu.pdf
    • http://karat-dobremiasto.pl/userfiles/file/zazebazadowati.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/42c6c6d6493df3661485435ece033d7d/66325243111.pdf
    • http://angeladaniel.eu/uploads/files/83626170107.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/493f92329bc41547000e3209545cec97/pebapanugidanak.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea224b5aaf---62912208155.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/8e74e0b86eea40976a3e56b5737872f1/45223577163.pdf
    • http://abacusnancy.com/userfiles/file/xijar.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16075d4b4cb1b0---muwamajasudekepefuwo.pdf
    • http://broadgatecapital.com/userfiles/file/gekalabugapakexapemegi.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/13fsbpehjvt27c25nnjeglqrfk/mizulekobefavep.pdf
    • http://suacona.com/clients/16856/File/67375975815.pdf
    • https://vannordenvastgoed.nl/userfiles/file/gebabugorosavakizawaji.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/42d317e8e5408779651f5542d010d185/gesewuvizegopo.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caec9e970e9---xuxozot.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/25d4a9e2539df99d1ffe18c33dd54406/58287447756.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608057d23dd65---58347974156.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c64b1b25e88---dupamumemugopolejujojiv.pdf
    • http://adamlegal.com/userfiles/file/fojojozudowe.pdf
    • https://we-plus.tw/ckfinder/userfiles/files/21671221231.pdf
    • http://hglobaltour.com/FileData/ckfinder/files/20210602_71F3CEC173C9DF4C.pdf
    • http://www.almansori-ye.com/almansorifiles/files/vuvotip.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=kink+the+pope
    • 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_off0000cb6c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6C 16792 bytes
font_01_sfnt_off0000e382.bin
6ac0d7c052c5edf36fece71556d1c54924a0389f0044b9f923c87c6a6b4a1c84
pdf-font-stream PDF embedded font (sfnt) at offset 0xE382 9956 bytes
font_02_sfnt_off0000f966.bin
28a218133ac5004ca1a52bed5015b45a47f84582daee271a4291bca57611da70
pdf-font-stream PDF embedded font (sfnt) at offset 0xF966 16440 bytes