Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0dab83a2ba56a19…

MALICIOUS

PDF

85.9 KB Created: 2021-07-04 16:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5876fbb44a55d4470510d4a7449b6248 SHA-1: 2257ab9a90863d6202b00d1dfd50e36e08ef7607 SHA-256: b0dab83a2ba56a197e900d24285f4c4562118c6ec79411520dbf1fb0e6f63e8f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely responsible for executing malicious actions or redirecting the user to one of the numerous listed URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://nomylo.ru/uplcv?utm_term=stereotaxic+apparatus+use
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3eec25be0---jizulotenifogib.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/25d031b2823f865cc6438735fdab9851/70265014548.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5da28d2065---71938890473.pdf
    • http://irths.com/upload_files/files/34217897237.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/74f4fb9519dfc1231467cd53cb55807d/filoxuxegulesuw.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8e673279f---72566623299.pdf
    • https://x-software.cz/data/file/34863952390.pdf
    • http://aite-materials.com/upfiles/file/13218875832.pdf
    • http://www.findvoters.com/userfiles/file/69062884505.pdf
    • http://zhengfutz.com/v15/Upload/file/20216191520541625.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702aa6a5190---borixekarejopusipikadatug.pdf
    • https://effetre.biz/file/99077276293.pdf
    • http://kurumakaitori-one.com/js/upload/files/24305202913.pdf
    • https://banderlogclub.ru/Files/file/47348323890.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094965827771---rebaragawojelil.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e86ae2f25b---dexizajomufabaxoja.pdf
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609915829bb35---regexusidomeredobesisar.pdf
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/6p723c4akf58td8gh3v4q2jd04/lizesiguvif.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddf975bd50---68117272120.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/4e655786f78c691b11034e357d5ebf47/jusisefavutaxiru.pdf
    • http://plafondchauffant.fr//img/user/file/sabevepipuravorije.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/p8vg5pave5m8mteet1v5cpkni0/ruxibebemikeb.pdf
    • https://fa-vietnam.com/webroot/img/files/salaxugojugekubofinaj.pdf
    • https://bevelec.com/bevelec/dossierMois/file/36870736993.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c60d769e67---15760824648.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_off0000eaa5.bin
f9fbec4699ed22f7966370c1f0b770826c3ebe8a99163eb5759c1e2220a5b1e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA5 10496 bytes
font_01_sfnt_off000102a7.bin
121b5b308e6bcfca4020cefd25ecfa2d96ebb5d41ee579cfe505a5f9d482e9ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x102A7 17948 bytes
font_02_sfnt_off000130dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x130DC 16792 bytes