Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc542e176de552d…

MALICIOUS

PDF

86.3 KB Created: 2021-06-26 05:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1b5c282695f5a38e73b3b8894c7545db SHA-1: b4fee1c2221fb6796c63d25e09af91fc80036c4f SHA-256: 7cc542e176de552d131af3148f96f70daefcf963c124e461f1af320d31d37555
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting it functions as a link farm to redirect users to potentially malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://vom-ragnaroek.de/uploads/file/pexowe.pdf
    • http://oresteruggiero.com/userfiles/files/mefoxisakinizepudivudav.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a422a762582---kiwefuwobok.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/59c5d9dd281ae9d44b600472edf45657/6809057303.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b10ca8a1a9a---dururoz.pdf
    • http://internationalnetworksolutions.net/files/42367138917.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/3d60bfe89fad3a7d58507b1413ddedf7/74313099462.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/7662c17c58c224f743df7ed04ca2e349/23519931647.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53a42d9fb1---74693358186.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ebfd8658a---14380984113.pdf
    • http://curry-box-deluxe.de/userfiles/file/17263472556.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083674a65473---24968746768.pdf
    • https://vansuloi.com/uploads/userfiles/file/26486718921.pdf
    • https://oncetrabzon.com/resimler/files/39379651521.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c024e49123---jatipudisut.pdf
    • http://churchtextile.com/userfiles/file/tobabogob.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160838054ea69c---9630030147.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ac1da90fe---namovogilepuxabibes.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f14a896077---87275841426.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/7007f9aa123b70567fa16e6e0df58cfc/31005792990.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607cae30664aa---84860813155.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9d637fdbbd82bbd409455814cc03632e/74031943929.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/3a814944c71b210f076f81bca6634f93/41980821510.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/65ec872e8c8014eb2a5f370ee66bada6/25979089625.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=what+does+it+mean+if+you+archive+an+email
    • 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_off0000eade.bin
5441f3457343147bdcea4fb6058ce2c3b339635137ff224a13581d47bd34c36b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 17240 bytes
font_01_sfnt_off00011856.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11856 16792 bytes
font_02_sfnt_off0001306d.bin
4730ab3eff0864464ecc798b5a492873f55be7b6eea10270be85fc8d52d86dc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1306D 11016 bytes

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