Malicious PDF — malware analysis report

Static analysis result for SHA-256 16193fe3d2879960…

MALICIOUS

PDF

99.5 KB Created: 2021-07-06 04:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e3343b7be1a014e67d66c5c64d212e1 SHA-1: 08e3e9caf4df54b9a31e1dd66e421c1bfebbad2b SHA-256: 16193fe3d287996039dd0d69f0847d907a3dbcf6d7a58e09d8f1d1a0ff15eb96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm with multiple URLs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/do1af69ob4e46qvg195s75q865/19867321139.pdf
    • http://hopkins1983.com/clients/861771/File/44946967448.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/ea33853c402cebca81d49ddb61e4ec0c/17088671349.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/djp6fnu0g9aj339b4epj8j92f7/zijezuforezipikenaxemik.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6e80f40df---15910281933.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/7c2f6728f7d8ab42637c525ab91474d3/21023272930.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/8122e0195517f7321c2853be8fef4ed6/rutefarelase.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a1860f80b19---23128286606.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088179ab1b6a---5976287244.pdf
    • https://tavio.ru/files/file/36456698386.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e87c2585a---75259794555.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160db4054c8a9e---sabuzuzipekozozobon.pdf
    • http://portalcom-b2b.es/img/user///file/_0933562001621599575.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/gjpfr6ruhaus9thj01b4hilnco/94468260911.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ffafe6d1a---judune.pdf
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/feguxafifikifexivopas.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/66f843c945f58db912e5a589ffd44de7/81654842285.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/694483f12116ef78e617ee96658f9b85/81386105040.pdf
    • http://progfin.pl/userfiles/file/96915093874.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/lg1pddg29l2cnh0h3u0uqaq36g/varadodavifajigafuwi.pdf
    • https://affordans.com/ckfinder/userfiles/files/kokavarasubomazazetudon.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160788bef5c45c---xiperikofuvaxugevonu.pdf
    • https://sharadsangam.org/UserFilesTwo/file/demek.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=parable+of+the+leaven+meaning
    • 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_off0000fee2.bin
4668809a3e2c44bcc302877b3e17807c34d0f034e8c71fb743e3be11a8b0bc42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE2 16904 bytes
font_01_sfnt_off00011774.bin
9b0cb0795325178c60444041f4efbf107becae8d4db5ae76e1812fa36bb1dbde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11774 10700 bytes
font_02_sfnt_off00012fcd.bin
07a2add66ef9a1183db6ed0e413101d195b74f1b5218b1e5d6552fe191b9e622		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCD 22844 bytes
font_03_sfnt_off00016838.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16838 16792 bytes

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