Malicious PDF — malware analysis report

Static analysis result for SHA-256 267980af8f2ffd73…

MALICIOUS

PDF

81.1 KB Created: 2021-09-21 00:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f0ff0967a433fbef46980ed49f936ce SHA-1: c82c7752c5ebf90d27cb24114de6370fe888ae17 SHA-256: 267980af8f2ffd73453d9efc5e147d61e1fbedd70ad082ab97e4c64c6101bcd5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics as malicious, including a link farm on disposable hosting and a high ML score. The embedded URLs point to suspicious domains, suggesting the document's primary purpose is to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=2k19+wwe+apk+download
    • http://ytlcases.com/userfiles/file/vebuninifomuzila.pdf
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bemigotudivebowegebubiv.pdf
    • http://jagodkaprzedszkole.pl/userfiles/file/79655027686.pdf
    • https://aviatroglo.fr/IMG/file/3139382885.pdf
    • https://viceda.com/userfiles/file/38340012641.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/3ea93b45925592f96212aaeabdb865ac/82381517319.pdf
    • http://gourmethousemacau.com/UploadFilesfile///93367708330.pdf
    • http://hotel-ambassador-nice.com/upload/files/18921780873.pdf
    • http://re-media.ru/foto/ck/files/97513902899.pdf
    • http://staropolski.net/Upload/file/78035075128.pdf
    • http://3colorjazz.com/fckeditor/userfiles/image/21289919632.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16139787cdf81f---60550040127.pdf
    • https://sofanet.ro/ckfinder/userfiles/files/83442237086.pdf
    • https://nordiskvillaventilation.dk/userfiles/file/78954201531.pdf
    • http://krakowska98.com/zdjecia/fck/file/wajikoxomazaguwedelu.pdf
    • http://tasarimak.com/ckfinder/userfiles/files/22529585723.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16146564a2568e---vuzoxevuvabesaragavetuwi.pdf
    • http://coeb.eu/userfiles/files/38303139259.pdf
    • https://ddtoyz.com/ckfinder/userfiles/files/fiwoxipowipe.pdf
    • https://piti.leaddeehub.com/userfiles/files/sevunerosevos.pdf
    • http://dulwichtaxi.com/survey/userfiles/files/98434959887.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_off0000d8fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FA 16792 bytes
font_01_sfnt_off0000f10c.bin
5c30e6091fc4057472872340c0deaa1444730fa6b7f2c023cde534869e66c564		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF10C 17916 bytes
font_02_sfnt_off00011f42.bin
501b1e65281e245f85e81a7b56c9cbf9ac4275a3aad36be4a407af9511b73158		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F42 10348 bytes

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