Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb0e5c6ff847830…

MALICIOUS

PDF

79.0 KB Created: 2021-09-03 03:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 47e9e56f10b34f39944b16b52bd26c16 SHA-1: c1eab88f3d624b787945621eefea9334e4226758 SHA-256: 7fb0e5c6ff8478306c82306a86d018a7f429cafbee1f5e085c88b0767507976e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The presence of these links suggests an attempt to redirect users to external resources, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6185

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 http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf4f089a96---77563494817.pdf In PDF document text
    • https://motelandratecuci.ro/userfiles/file/lamixesabowumuwogub.pdfIn PDF document text
    • https://sukaunited4d.vip/contents//files/76759179482.pdfIn PDF document text
    • https://megatex.ua/images/uploads/file/gavamibamazokuduzul.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/wizakedosebusidoda.pdfIn PDF document text
    • http://recrute.fr/files/files/38107458572.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/35137397030.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/11291022125.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/tekigejisuruxaxo.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcaf643a2a7---28622120644.pdfIn PDF document text
    • https://hostmegasoft.com/calisma2/files/uploads/70492456068.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb2c16c66a---nudurinemuvefexuv.pdfIn PDF document text
    • http://studiostocchi.eu/userfiles/files/64809363391.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608030b6b747b---98093484841.pdfIn PDF document text
    • https://5a.ro/ckfinder/userfiles/files/2137654512.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/18661976756.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ecea50360---fejab.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/vitapibinuwumeriguvep.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/pubexelanivab.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849ea2aa58c---66637728875.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/045dd49628d54785d0dd76873537b163/xiwiso.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/34947353041.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/mopafi.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/62726368624.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/bvon6pkm40ldti3cuv3861h079/5327487011.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=finance+bill+2018-19+pdf+pakistanPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C3 11308 bytes
SHA-256: e7e7751e1521a6db6a7a204355e13b585e2e67f155a335d099a28f3fe2d8bc53

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