Malicious PDF — malware analysis report

Static analysis result for SHA-256 954ce9ce4fa897b5…

MALICIOUS

PDF

161.4 KB Created: 2021-06-30 19:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f810d278950d40f8a18b2acfef19c2bd SHA-1: 7bda65b47d25b90b078890972dd25df001f6bf9e SHA-256: 954ce9ce4fa897b5941121c3628070415d0f9beb915b0f069110335be3cbdd4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8749

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://nbtele.com/en/cache/fck_files/file/gozejukazaf.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083f3347cb7a---wovije.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae534c666f9---4179172866.pdf
    • http://esistore.de/userfiles/file/56828769011.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094f0c2b6ca4---sadoliture.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/f448e2c59081248b91c3162fa2155c9e/39938326791.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074350474b33---pojifezudajopukekaxi.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160cd190e036d4---53910814486.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/qqhvksbgaj9168m6lqi8umoj0d/84382322612.pdf
    • https://khanikango.in/file/mavibumijufibupuvifa.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/97vkbdkda6lqijs3pp5238hgo1/zitudovepila.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a12a69adf09---92754045765.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68a848a284---pajizulalap.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160d1853853d77---vivuvesinivom.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d03d33a64---82775330113.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/vufj5o0dg3tokjeofp4pd0i3d2/23510077867.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16099d6c83fd16---21295732813.pdf
    • http://hitecds.com/userfiles/file/tokuninamitujume.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160dc829195b16---12246895824.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/72dbaa813dc1f7fa3f9db8efd669ccda/gutedokabixonadinixibaje.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb8b23c7e6---35900848119.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb028941e8---folukipuvagex.pdf
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/j1qdib66evenmtqfkndkck2on4/73448630846.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf7232601d---zenite.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b789ed65456---36309364662.pdf
    • http://hum-lucknow.org/test/fckeditor/file/2589496887.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=fundamentals+of+corporate+finance+12th+edition+solutions+manual+pdf+free
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001dfea.bin
5e0c891f434cbb918610cd118a9dd88c42221fa4f5fde463cf8ed88f35e125c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFEA 11132 bytes
font_01_sfnt_off0001f9c3.bin
d467719c4bff4d89cc12fe6e3e97200615996648fb0f384d8b06dcb704188275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9C3 25272 bytes
font_02_sfnt_off000235a6.bin
1448e403e3f778c82bf370c0e730ff39827c94b7f150a678ebbcf6d3ad9e0f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x235A6 18080 bytes
font_03_sfnt_off0002517b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2517B 16792 bytes
font_04_sfnt_off00026988.bin
8e138e48cd91d55bbada36f1a1d2dd93bae9684af6b29b8c366c8920883eb4b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26988 3084 bytes

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