Malicious PDF — malware analysis report

Static analysis result for SHA-256 582666ec10bfa184…

MALICIOUS

PDF

86.0 KB Created: 2021-07-02 13:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa70a56468c4213b555b49542b866bd6 SHA-1: 3a2f949980211ac7442eea32a4049e7555ad3172 SHA-256: 582666ec10bfa1847d2a7f89cb7d09cdfb103d76ef2ec5bce2578fd5af1eed83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress installations, likely intended to redirect users to malicious content or phishing sites. The presence of external URIs and link farm heuristics strongly suggests a social engineering or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://cructi.ru/uplcv?utm_term=edt+to+cet
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/0480282ad7823890341a77c066eedb6a/mevomi.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/2ebe640dc7bbfb50d10dbfef878e4590/88906750265.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606cffdd2513d---pevagunopipi.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/aa252c4b1d56443018f4eb526d9ccf5e/zobulowixedanovenomanodu.pdf
    • http://www.tobywells.org/media/fckdir/file/48446467618.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ea65af9a1---torofowo.pdf
    • http://mhinflatable.com/upload/file/dolives.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/ada7a7352ecc22cd1b7d8f79d528b70c/90117956814.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16075aaff3009a---tenilobujuwifatido.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/c2a44fd44ecb5930394eb4c25e8ae39c/9771879014.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/8bd3e5296eeee87f57f7e953dad858cd/zujisir.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160846f48c29f6---75671340258.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b97f9aa2e33---zososu.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606faf459d604---83684687008.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/8497m61gtutoibjnti8mqkvhk3/78877124181.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b60645354d5db5e717f07d3f8c140494/35603936036.pdf
    • https://bamfieldrental.com/userfiles/file/sabigefujuzenepopavosi.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d249af1898---zagatagowozetakut.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd8ac741d5---92607326685.pdf
    • http://zerosquareonline.com/file/gutopedumewetutenifat.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bffb6ed1c7c---mosufaperufo.pdf
    • http://al-bandak.com/userfiles/file/78549880210.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4f5.bin
86b8c62a477f2102827d227f4c6e008e33762edabacc7885ee857794a50eb3ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F5 9676 bytes
font_01_sfnt_off0000fa0d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0D 16792 bytes
font_02_sfnt_off0001121a.bin
86a0e4ece83ff6b1bea8bc70344483c25a45292a9ed51852342c680381dc5495		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1121A 1744 bytes
font_03_sfnt_off00011a5a.bin
8459430215564e0ee831f5ea7789d2aad8b781720af54d07368f7026d40d0dc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5A 17844 bytes

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