Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d3993aafebc294…

MALICIOUS

PDF

92.4 KB Created: 2021-06-25 22:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24411aec92d25fbfd408763458de43d8 SHA-1: 8fd732ee437ca6b0646a460b444a260bf2563526 SHA-256: d0d3993aafebc294ef6182f3d50e440ecf1f1e9b0676143cd9e176dbf8ffcf00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to lure users to malicious content. The presence of external URIs and link farms indicates a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://queure.ru/uplcv?utm_term=bells+on+bobtails+ring+meaning
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160951ceee1fa8---96612498838.pdf
    • https://gadd-asso.org/userfiles/file/39970946354.pdf
    • http://asupuro.com/user_data/image//file/99964766231.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/257b97ffe3ee8974e23365a5b028935c/pinepolilitisivawilasivor.pdf
    • https://artlabjo.com/userfiles/file/jizunem.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/biojq9npl2e3p862vn0ski81j8/migavurijela.pdf
    • http://gesundezellen.de/neu/userfiles/file/badiwebakugu.pdf
    • http://thietbiotoviet.com/Images_upload/files/xozowikarepivimojez.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd20a90350---23530295706.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/g15gutosbcbfhrinjknp4rfia0/73808377795.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a539c32705d---82576684081.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/f5a78cfe74f625c5fe2a274eff8eb6ca/98501549547.pdf
    • https://iva-vietnam.com/userfiles/file/36535510266.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2aa5bdccd---9675703463.pdf
    • https://betenenergy.com/sites/default/files/file/49007520994.pdf
    • http://jirehenl.com/userfiles/file/270143371553.pdf
    • http://phanphoiongnhuahoasen.vn/upload/files/dezotidikavigusipelun.pdf
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/61783369175.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a7592310969---13694795670.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a7abba43b---64056376764.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098b2d1e83a9---29822364612.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/buxaxevetesewilekuburofo.pdf
    • http://mdsalon.ru/img/lib/file/nifagege.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/5fcc1538b601a81efb7c98a2ba8d6f41/pedoxezugojifixawapaxo.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103df.bin
f290cb65d55a541946b0d8f0c61b364f4953092db59de5fee552df670d3172b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x103DF 10644 bytes
font_01_sfnt_off00011c42.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C42 16792 bytes
font_02_sfnt_off00013454.bin
890c5c5cc470c74af708f7b18db22291f1c84791209bfc99ac992ac23ff293ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x13454 17620 bytes