Malicious PDF — malware analysis report

Static analysis result for SHA-256 9942eda822d8feca…

MALICIOUS

PDF

90.6 KB Created: 2021-06-29 11:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c7d223409584ee9ecde0501c08d69446 SHA-1: be08787d215b6389a04e9cbe268724b188efb4dc SHA-256: 9942eda822d8feca8a06f8eccb4fe30e7a4387726dba2e2e2c16f1219de881f5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 links to potentially compromised websites, suggesting a phishing or malware distribution scheme. The presence of a 'download button' lure further supports the intent to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://catamma.ru/uplcv?utm_term=10000+bits+to+dollars
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/d7e2070cead771f5ed7f4ffe6cc81c61/67386638600.pdf
    • https://bouwservicewinthagen.nl/userfiles/image/file/32626483070.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074286abd859---56078531514.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c52fc6d836d---77408566864.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a5f276550---24730203789.pdf
    • http://www.aluvascientific.com/UserFiles/file/rolisunevopusozoxuten.pdf
    • http://macap.nl/app/webroot/files/userfiles/files/20872566663.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608425f437d32---30865569659.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68935b9071---66535316166.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cc670a375---mudazupexum.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/625b0d7fa07e6dad1df2137ffc14ade9/lutowukodevojexafirigigoz.pdf
    • http://ordinate-ltd.com/file_media/file_image/file/gavedurepagilor.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087187671c5b---fumedokakaneniboke.pdf
    • http://iviltra.lt/images/files/dexivexesugisevef.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fd3021cc917071addeacbe21940ad91c/25392764955.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608255d8e36f4---vowedaximoruwuduta.pdf
    • http://builderall.info/userfiles/file/17518682668.pdf
    • https://blnk.eu/userfiles/files/pemubupixezigorisuvewu.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609052c30a318---magugonavizovinezorut.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfda40b86d---79368175143.pdf
    • http://nordicaluminium.ru/userfiles/file/55432799793.pdf
    • http://aimic.com/userfiles/file/zitil.pdf
    • http://aarogyamedico.com/userfiles/file/madetokamop.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/5e23934c732492e5da3821a862104895/4321804997.pdf
    • http://beadsandsupplies.com/images/file/38038736075.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c59bda9bfb1bd2b939b57c27d2df62c3/kotewal.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09719dcac5---dosekugotukibu.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_off0000f917.bin
9718eafc81ad315d1e81a1e35616ebb256d7da0be762de9bc9a689f5ce746cdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF917 10220 bytes
font_01_sfnt_off00011011.bin
0ff2573c917b15bb93dd18ebf0e05bba6cc51a6c5dd6e330db81cbe7e0e404ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11011 19704 bytes
font_02_sfnt_off000144d2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144D2 16792 bytes

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