Malicious PDF — malware analysis report

Static analysis result for SHA-256 208179e7cc6e93c2…

MALICIOUS

PDF

70.4 KB Created: 2021-09-16 18:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cff673659a88a0571930a59b6530294a SHA-1: 5fc920cffbe346482a8666775019f55e874c377c SHA-256: 208179e7cc6e93c25d2454cde2598ddf38955ec403136c21bcc6c251023c7a37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to external sites, some hosted on what appear to be compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure suggests a link farm designed to lure 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://drafthe.ru/uplcv?utm_term=hawks+heroes+rising PDF link annotation
    • http://onlytech-tunisie.com/userfiles/file/zosibejuwexogow.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/95777224984.pdfIn PDF document text
    • http://caythuocnam.org/images/files/67056085578.pdfIn PDF document text
    • http://ayurvedicclinic.org/userfiles/file/12433933213.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/tilifa.pdfIn PDF document text
    • http://nktrading.qa/file/files/towerasokusu.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/fasikegusekeposi.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/73721984829.pdfIn PDF document text
    • https://shibbirs.com/media/files/direj.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1b31a2c70---retiwukesaka.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/20219101957454174.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/8b8bf85f866aeff52f86ad2bb6122802/vagevoruwawanulano.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8b7160b63---vozem.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/49117356814.pdfIn PDF document text
    • http://24hnbc.com/assets/ckfinder/core/connector/php/uploads/files/46142187731.pdfIn PDF document text
    • http://getrade.net/uploadfiles/file/52689579399.pdfIn PDF document text
    • http://linklandhotels.com/upfile/editor/files/86693430002.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/munojetemazeropefaz.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/rimemelumoxi.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/44389346896.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/rifijarupebomogusasip.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_off0000b197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB197 16920 bytes
SHA-256: 1917f9abed4dd02b940ab92aa19e6e282399be6eae37dd8e5e71679ff4da3a43
font_01_sfnt_off0000dcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 10412 bytes
SHA-256: 8654de4dddf3b0e414d38b59da6dcb3ac36d9d57e3c4e2fae3220a1b0b2e5837
font_02_sfnt_off0000f485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF485 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1