Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2924d79fc47dacf…

MALICIOUS

PDF

113.9 KB Created: 2021-06-25 23:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 264604e84a018039b0e9de7462de2bd6 SHA-1: ef1e3499dd3cf7eb510a090a7cdfa0ce365354d7 SHA-256: e2924d79fc47dacf1abd4ef42c7d429f8930f6c7f999a94885c159e3b5c6c761
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via a link farm. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9855

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/efde9731f1cbc3dd22e81a6370980446/revijixukob.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/be8062799e09c608499433ec199ab5bd/gavorukevebuloto.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/96766c4021b17c6b309c5f8305277152/fubadeg.pdf
    • http://circuitvietnamcambodge.com/hinhanh/file/38865512125.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/e8e686ca9bc6092f8c122980ea693130/wazamubofuluxeverajolesez.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b487fae14fc---67033063606.pdf
    • https://manuscripthandler.com/userfiles/file/62459856591.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/d342140810d7a38af15319bea1cffdbd/1871464367.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087299d6dc86---88916618951.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ms3lj7i9vgajrqi353ejs6u031/vegugafoge.pdf
    • http://qytbearing.com/upfile/file/85652257731.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad988456ea0---polaxuwejiv.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a7ad68226---25373296498.pdf
    • https://stef-nancy.fr/upload/document/zebodojox.pdf
    • https://imahima.xyz/js/ckfinder/userfiles/files/8029658326.pdf
    • http://www.climatisur.com/ckfinder/userfiles/files/54357520263.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/94fdef722cec0bf429b58832cca20759/movebezovavu.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/cf8c43d1a31d6ed2f46c240fb2920287/22100146114.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb01d40f16---71243913081.pdf
    • http://medicapoland.pl/uploaded/file/52122251670.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/mkosa9vlep75fdg565c5r00152/sitarejizuragima.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/16ddcc0e3ee2ead6683bed612bd9b134/bijogewon.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf03ba80ab---88417554624.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a271d7d04---53319445720.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160afeccae65ad---wirezotezomagamoz.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608231d9a0acb---wiked.pdf
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/pagavawelototijunixagewu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=discretionary+government+spending+examples
    • 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_off00015bbb.bin
fc9cc523dc00221fbb47184ac3614f836ff11d4b039e2b496af2db8c8beaeca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15BBB 11140 bytes
font_01_sfnt_off0001759d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1759D 16792 bytes
font_02_sfnt_off00018daf.bin
97b98bfb2b6aa83221a86872983eb2d552309f77513f7e99f4d0826e2151c7ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18DAF 17020 bytes

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