Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd22e022173b3f6…

MALICIOUS

PDF

93.6 KB Created: 2021-06-26 17:30:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59bd133373ed2825887af228e420f5d9 SHA-1: 41a12e9a39a00b708edc6071df4536ccca7d625f SHA-256: 9fd22e022173b3f640ae5db43d26c8c78b0c8d3b3a5aebf45d1ac76d27ab7343
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised CMS uploads and disposable domains, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 http://narcisse.sk/editor_uploads/files/61382065508.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be3f130c704---75251558206.pdf
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/c6b635c44c092e491e8c415e2c4cbfd6/99345130370.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/cc679e3e228bf125d57af90ab579250a/19997391783.pdf
    • http://scouttautomotive.com/editor_uploads/system/files/tejuvulumisoxawuxi.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e166c5799---77361235080.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f9c5780c6---xatovazevizubazeleti.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/dr3731l9dnl30f973maa4tbkim/tevakolisipebir.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11a5c30592---suvatidorabumak.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/3c53de19af2480e71e8d85ac27917b06/6687266088.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4cf72785c---newipofivexo.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/28062379619.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c145840ae---79662949290.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/02bf2cdf7f6f1d859f06c9dfdda4e9b7/64487986754.pdf
    • https://burgas-remonti.com/userfiles/file/nolidapefowuse.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/6dtg9hk55bc4bi16do7hs5fvn8/26862410963.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/sqe1p9rsb1173qolkgl372jt78/jamelenonifu.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/9d53bde5cba6be689a7da78d8a9a0f95/wemoj.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607412b6179df---73943804874.pdf
    • http://stroisvias.ru/userfiles/file/32042885661.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/bc717f214c364c8444911a2e32fb2b88/932427598.pdf
    • https://masihpt1.com/contents//files/jijiroxurusafe.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/56c8f9669ffcd8598f5ede113a5e85cf/kujowutezalirog.pdf
    • https://foundryindia.org/userfiles/file/zogewejewuvavivine.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160d1bf790795d---bekasunabesi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+clean+oily+plastic+containers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f72d.bin
36ab8ee6ceb95a0a7747728201e51323a72fe0eaa0ab4e943b81dec5307a26f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF72D 16496 bytes
font_01_sfnt_off00010d9d.bin
cb439216e3924484aa64feed1c9e9fa2d32a3a5f371a2d0dae002ecefd41255c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9D 16432 bytes
font_02_sfnt_off00013856.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13856 16792 bytes
font_03_sfnt_off0001506d.bin
4ead622c0b873fff38b661c10c1a4d9bf2ea32bef600f84bc1a293f96d253a3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1506D 10560 bytes