Malicious PDF — malware analysis report

Static analysis result for SHA-256 227029118a015340…

MALICIOUS

PDF

71.7 KB Created: 2021-09-06 01:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: adb269c1954f39e9a06e804c460a04bd SHA-1: 23ac5ab8fd60d7598107aefb7ab582bbbc78197b SHA-256: 227029118a015340746dc12567210ca183b65a01a3d678d553e733f85b9a404d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to redirect users, with some links specifically targeting disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7666

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://cnhhgj.com/upfiles/userfiles/file/13089013011.pdf In PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/1a3eb07aa4f3c673623868a58bc9dbec/pavajiwepato.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/ecb55a05e381ae6e5b32f7e1a23ebf45/20494741300.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/zixajovaresolozarosurep.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/239adc5154056ecb147df011d7252f32/33952080406.pdfIn PDF document text
    • https://turbooto.vn/upload/files/widobipagapisetobitidafa.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee41192f48---zorowinokebaba.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/ulhb45mmuk8stoumgfotgmvaer/godolorivapofa.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/botejisiru.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ba2d01d4f---kakor.pdfIn PDF document text
    • http://lagrupacio.cat/file/zopaja.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/6577405553.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/40659036242.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac95661cb1---85021255714.pdfIn PDF document text
    • http://smitheaster.org/clients/861344/File/xopaguxino.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/32509082897.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/20803033733.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/15041769631.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/5799b5c89d09534bbfc9a7c2edbd5e65/63411575060.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/l4346nij14iepnlcrvjpce4ph7/82566414586.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/65815855855.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=crack+sat+physics+pdfPDF 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_off0000e9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BD 10552 bytes
SHA-256: 04c59006128500ed5c563d4e1021219135290c268ab58af17d2fde14b5bd4c1d

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