Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc099ed1e2498ce…

MALICIOUS

PDF

85.3 KB Created: 2021-09-01 00:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 81fc8e0c31bc2b6bae1cf6286d9af515 SHA-1: d7878d17a8ea61bad1e96ed19cc5136b2cbd4284 SHA-256: 0dc099ed1e2498ce6535a8c533cf17a738d76988f802d0662236efacb49b4938
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also functions as a link farm, directing users to multiple external URLs hosted on compromised WordPress sites and other disposable domains. These links likely lead to phishing pages or further malware downloads, as indicated by the ClamAV detection and ML classifier.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://pixomot.ru/uplcv?utm_term=hey+is+that+you
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b03a909a2c8---xekajutebejefusekafexum.pdf
    • https://hoanghaie.com/Images_upload/files/fakuz.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609214b3ac540---lanemiwakotipewesa.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608078d3ea253---45508819948.pdf
    • http://tnslib.tools/userfiles/files/80701240878.pdf
    • http://kiavysocina.cz/UserFiles/File/3225130787.pdf
    • http://handbook.hu/upload/page/file/zerunuzuruponudi.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba98fecfc4f---85702462352.pdf
    • https://castilloexterior.es/ckfinder/userfiles/files/timetirinez.pdf
    • https://tectrongim.com/uploads/files/6083719975.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2f22e1f92---27717903335.pdf
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/21976605735.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cc61289b7---7989120779.pdf
    • https://securitegenerale.tn/userfiles/file/xikoga.pdf
    • http://sparan-art.ru/ckfinder/userfiles/files/94004464504.pdf
    • https://nakipoglugroup.com/upload/ckfinder/files/gejejaxaguve.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609188a756bf5---88761268098.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e3e75d9a9---69685614320.pdf
    • http://zulaikhatextile.com/userfiles/files/jaboz.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/ls2ueer17fplqhuquno8csppl4/5267864505.pdf
    • http://bajcsidavidfoto.com/_user/file/tofukuvowulatexipexiv.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/e147a02b90bf46ae6eb5f7942513f728/64198238610.pdf
    • http://magnumprint.ru/upload/files/gigarupugaxidumokulopesi.pdf
    • http://liddellgaryfamily.com/clients/863293/File/73737678539.pdf
    • https://actorconseil.com/files/file/zanulamogutibusu.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_off0000e519.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE519 16792 bytes
font_01_sfnt_off0000fd2b.bin
c36c193c282dae3277bdbac6010b6093d6823de2a6ade87a77278e9c7369f9e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2B 19252 bytes
font_02_sfnt_off00012f47.bin
7f19107b375efb3f37b229af099571fb402260ac83eccd14b9dbfe564bf75739
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F47 10160 bytes