Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e54ef0adb5737b…

MALICIOUS

PDF

63.7 KB Created: 2021-09-05 12:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d8956f75e0b0b93332beec27bff88ef SHA-1: f5ab1588a1790b38a422cbc894e95ca3ae198547 SHA-256: 94e54ef0adb5737b4406be39a64a6dde017d412b2c18b6b5f01ba01998c9481a
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, indicative of a link farm designed to distribute malicious files. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a lure for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6960

Heuristics 5

  • 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
  • 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://kadh.kr/bobod/upload/file/54117510590.pdf
    • http://scro.ru/pic/file/wobesiguka.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f65cbae6ae5---vuvibevuvadox.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/c4febb4a48c35b2a952b870e48bbf704/2116546293.pdf
    • http://forglass.sk/userfiles/file/gatimevibuvugot.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/6l32lti7feqnk3oa53g5cvd241/18217201846.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c069d5060e1---38525138599.pdf
    • https://festival.bg/fckeditorfiles/file/xetavudilufazigukuvadotud.pdf
    • http://php-lounge.de/userfiles/file/58828911355.pdf
    • http://myjobcareer.net/userfiles/file/2021061601115473499.pdf
    • http://montaze.org/democms/userfiles/file/xobisukiporabezaxenogu.pdf
    • http://pcwenhua.com/uploadimg/file/16302290961097308772.pdf
    • http://rc-mst.com/mst/_upload/files/xenegowajugikijebelasiz.pdf
    • http://cowmoo.org/ckfinder/userfiles/files/wolewomorekuzemabule.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/lat5mi273hdqbou052a1idot52/78613904405.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de3d9b735fa---79154947623.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a402295c7eb---46650986093.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/a7caefcb3f089e7b8e69d5ea3c1e7417/pezubejelawe.pdf
    • https://dammesliepas.lv/ckfinder/userfiles/files/87401742311.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160aa24ae532f1---3610196740.pdf
    • https://baongochoa.com/upload/file/bipebenim.pdf
    • https://horizontire.com/userfiles/file/vidapewujij.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c86e4e575e---paxateguwinusosozewe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=editor+de+pdf+completo+download+gratis
    • 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_off0000d81a.bin
6b20f6e97f298fa24fbc9a1569c9ce163cd8c523cd7e84017e81342f25b8fc0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD81A 11032 bytes

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