Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f2cc696b562d5a…

MALICIOUS

PDF

85.0 KB Created: 2021-09-03 16:28:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f0aef98d9df160342745d11fe179fcce SHA-1: bb1c0db5c44871c065ba39dbbaf67ffcff0a68f7 SHA-256: b7f2cc696b562d5a66692d89543c7e4caee8a6a009c09085df0d3fdbc8266937
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://crewmak.ru/uplcv?utm_term=section+301+tariffs+list+1+pdf PDF link annotation
    • http://hifi-markt.org/kunden/kronhardt/ckfinder/userfiles/files/getelexevetowebiz.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/h2m9jp61v8fknt0tresghm83pi/44466681561.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/85030966388.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210827_D9DD0F7CEF84F96B.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/d86f29323927217c01418e98f93c1fbb/jikarivegetame.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/xogaduwaxopipugorirutoxad.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/lobif.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d435b3de86---6033811478.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/kugajewomulelakelutamerib.pdfIn PDF document text
    • https://medtek.vn/storage/file/lafunowinemunejikugugefe.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/99239333923.pdfIn PDF document text
    • https://lordoptika.hu/files/files/64230147472.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/11209526858.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/tosabebigexaj.pdfIn PDF document text
    • http://emanuelarombiarchitetto.eu/userfiles/files/sozoporukizekozozujetawu.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/lojafubo.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/vmo1hq61ouhtj5j1vdm3eo89o2/80117941875.pdfIn PDF document text
    • http://gdgom.com/upload/file/210629153831825498dx1x4ginueh8.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccf9b097eb---68477928659.pdfIn PDF document text
    • http://newmob.it/userfiles/files/tudewiror.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/tezazovemipavupefevi.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c59fd8030ba---zobulonopakudosatovu.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b82e043e46c---dukabororavorekavetikal.pdfIn PDF document text
    • 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_off0000e4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D5 11032 bytes
SHA-256: f9d0cf6696a3b318df94fb9ab46135191362ca096f39e37f26d214d9fda5b232
font_01_sfnt_off0000fea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA3 18152 bytes
SHA-256: 830ac67c806cedec6c93f62cc96dcfe0e94173a61ea9e79efaca4a28d34a23bc
font_02_sfnt_off00012deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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