Malicious PDF — malware analysis report

Static analysis result for SHA-256 15ea5ac9a29d84c6…

MALICIOUS

PDF

62.5 KB Created: 2021-08-28 13:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86dad9a1805c47938a8222f35d44abf3 SHA-1: 44d3fb2230bc23d950b25273f19832e292606dc8 SHA-256: 15ea5ac9a29d84c68ea0f588e71ba067e70c29233e3e838fde1c2e08a05fa7f2
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload storage, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of these links and the nature of the hosting indicate a tactic to distribute malware or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8102

Heuristics 5

  • 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
  • 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://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/360c74ccc66a36019cd212e48bb4ffcc/23723786421.pdf
    • https://www.channeloflove.com/ckfinder/userfiles/files/sumomaselevuji.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ccc71ba04---27369634217.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810000640ab---39165856780.pdf
    • http://tehnicgaz.eu/files/file/29068679601.pdf
    • http://gndpta.eu/news_objects/files/jibomimi.pdf
    • http://gesundezellen.de/neu/userfiles/file/62586123000.pdf
    • http://netmutum.com/userfiles/file/gitun.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ccbe1233f---liduzebibewojeko.pdf
    • http://cck-brno.cz/ckfinder/userfiles/files/41864739265.pdf
    • http://anoh.net/pds/userfiles/files/79985849594.pdf
    • https://civilkontroll.hu/uploads/file/55687183100.pdf
    • https://asesoriagade.com/app/webroot/files/files/35181337919.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160831b709ade0---46567546328.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/udc9ike9g47f979pgerctu0lrh/61952421181.pdf
    • https://ivanamihic.com/files/73521144923.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6620d56f41---40407110525.pdf
    • http://liebherr-tr.com/userfiles/file/goxesudabokuturiwa.pdf
    • http://mexvp.com/ckfinder/userfiles/files/luninalesotukexanabaxig.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba48d360b7d---31466639338.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf67b6c48c---wamozukevijuvap.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73a9cae73f---17737472810.pdf
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/malebefunolojiwatikori.pdf
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/bapirifefajex.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fb1d50dc62d---73149003888.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=climax+meaning+in+telugu
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba28.bin
66f5c1aa7ae13848ff2bd6f87ddff14668a8641e0edea479672d7f8b61e0c532		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA28 19312 bytes

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