Malicious PDF — malware analysis report

Static analysis result for SHA-256 9420968113862e0e…

MALICIOUS

PDF

89.0 KB Created: 2021-06-25 23:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c8b823802cc2013e7651c10c28d5035b SHA-1: 12a7b42ad5e9ec5841be924683364b4045c51d5d SHA-256: 9420968113862e0ee2626c93a02795704978e599f50d8efff0dcc49089efda55
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The primary attack pattern involves directing users to external sites, which could lead to further exploitation or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://medvor.ru/uplcv?utm_term=partial+differentiation+matlab
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/ug3erm3a8q6mcfdn11h2c3t7p5/20779073054.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/781d6b76474865b4d0cf037e3d3354fc/42822869199.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/d5d3b56711455ed46a02129c80fc6c24/rakisojixuren.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1606f11b5eb260---75195857115.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/d2002ce78deeaf1edd1fc425307a51ec/feluzunizajativit.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/4ce1d43c278caa1b7120dc454ed02584/62065402130.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a973debb6c8---rafizuxipekeg.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086397963cb5---lorod.pdf
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/8fe3e2f3d45e5538c74cd0b82864e1d1/dokoberojediniwipugu.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/n1lkip7iqt4l24tbgs6qodu8c4/44247473676.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c471675da06---risejabipunofefu.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/8e8d80f4b9465aaa83b7ce01f4aa8a51/tefabiwudu.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/7527e57f4ab755d25300fe83627c0aab/jodijirinoluturarezulu.pdf
    • https://nacionalequipamentos.com/ckeditor/uploads/files/peverinosabaletemigexina.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/14b01d941ffd65ee4be0db9d375c4a42/16717479606.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05994a8d55---vikobutexemetopugivij.pdf
    • http://leesfeest.nl/leesfeest/sites/default/files/file/xipimo.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d24fadf002a---modozilijobagerax.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/bf29e253d6924da1ebc208cd272fd8d0/kiruvoj.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607889bebf17d---pamevurig.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/rkd70jb1rppfj5jad69rqh0746/xumovopakal.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/f3334adc991f4f0639fbd210f2439a50/muxidalonorisalibi.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607390c454de6---kidasikasewafagekimibe.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_off0000f364.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF364 16792 bytes
font_01_sfnt_off00010b76.bin
daf9405813af3cf6399f57613e5d7982dc0acae8bd32559e724a324312d7d524		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B76 19128 bytes
font_02_sfnt_off00013edf.bin
7083d08b916818e3fea799163bb7bf0e381031912799ec7a8d5cd0a2658ccd78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EDF 10488 bytes

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