Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2cec68b45afb621…

MALICIOUS

PDF

73.9 KB Created: 2021-09-25 08:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 64e2794b18c5be5671eb36056ff18a34 SHA-1: 9e445bf4d076bf3ed8a3e2ec39b963de4710c58e SHA-256: f2cec68b45afb621b067f00d8efe12853c437f6eb6980e6ae4041ac17af495c8
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with a link farm designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://cihangirhotel.com/upload/ckfinder/files/93146069639.pdf In PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161409b267d6ae---81713179276.pdfIn PDF document text
    • http://remobudostol.pl/pliki/dulazewip.pdfIn PDF document text
    • http://imi.vc/upload/files/68890360483.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/dazurogawasitalop.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/33099300295.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/10322479560.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/b008b59199b57e86fe8b85a3f9e468d0/21347990074.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/57111117749.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/9021988121.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/roxitixogetikubeni.pdfIn PDF document text
    • http://euro-ex.com/images/blog/file/gedekaperibuvirimiken.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/9eb13a563c31a953d250928a3e28a053/binagudonudobamubiwam.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/luvenapobulolilolijusal.pdfIn PDF document text
    • http://e-sportis.com/images/upload/gofawufimuzularameli.pdfIn PDF document text
    • http://ls12368.com/userfiles/file/53537769974.pdfIn PDF document text
    • http://gewald.ru/content/Files/15883577341.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/40589521366.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/24a8e44c7ce4dc747cd140fd23c28f25/35968740790.pdfIn PDF document text
    • http://machulski.com/public/file/sufebal.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/75321436808.pdfIn PDF document text
    • https://seedcambodia.org/htdocs/cljr/data/files/zurazavuda.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/161462c88c5d5f---29896033926.pdfIn PDF document text
    • http://aeklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/47259185360.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=fox+fluid+mechanicsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB854 19028 bytes
SHA-256: 77d8cfe70fcb7c7a3acf0e3e8ada0eef40f7f1d614ce928203323b293d58ffa3
font_01_sfnt_off0000e97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10195 10720 bytes
SHA-256: 1151fb5c50a11f0bb166ef74c8f99e037309d9a12cab3bb8709ab6070d08c4f1