Malicious PDF — malware analysis report

Static analysis result for SHA-256 e061377a824b6e4b…

MALICIOUS

PDF

90.1 KB Created: 2021-08-05 05:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd473e88004cd2180915c0faad820d51 SHA-1: e62194373b8e5e5faaef589b80cc44e7d0b81077 SHA-256: e061377a824b6e4ba7ad60fb39756af29634bb571942091a4c33aa238fe6030d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://garglob.ru/uplcv?utm_term=delta+force+xtreme+2+free+download+full+version+windows+7
    • http://bawaconstructions.com/editorData/file/84626933961.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d585ab1ee3c---47686068728.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/142179a8958cbb30339c31a88dd6d7b4/58684805145.pdf
    • http://tunglamgarden.com/images/fck/file/bemutofuvijodomod.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/1f348b1503f46b188f65a47662a41038/loginolani.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3185037f82---butovomubov.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff9350dbc7e---bigafasapom.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/6852titfkb0peqaourl8uovhn7/welovil.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c44ba6edc---4312211412.pdf
    • http://gunjanjain.com/app/webroot/js/uploads/files/vavurap.pdf
    • http://otvorene-srdce.sk/userfiles/file/98313616791.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/48868529369.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/1670f7ab8b219b2f7bcd6a8b7e6541cf/70496356208.pdf
    • http://aliceinformaticasrl.com/user/pages/73389707486.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/e0j0vt6811lckm44ntgtuepipm/xijuzixefiduzu.pdf
    • http://beastyenergy.com/userfiles/file/nevogaxubored.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7c8a5101---76461414159.pdf
    • http://finproekt-msk.ru/userfiles/file/xufolakum.pdf
    • https://murtenhof.ch/userfiles/files/75435616286.pdf
    • http://danfilenemd.com/clients/67744/File/nofetebixaravelagufa.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb793b64482---23041905719.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bde6e91231f---96808145135.pdf
    • https://autoprofi.ua/userfiles/file/74838496171.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/sii8q5h0i7psvng3piug6g0ee2/84702837641.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_off0000fa81.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA81 16792 bytes
font_01_sfnt_off00011298.bin
5f0ce9095adebe2cf71499ead9cc41cf77873971efc69d8bff7260989f818f84
pdf-font-stream PDF embedded font (sfnt) at offset 0x11298 11164 bytes
font_02_sfnt_off00012cde.bin
2ccee17d76bca89d8aa39dc8312a630814c2b03558fda9ab6f3baf7a46819962
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDE 16576 bytes