Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c0511ce4887d04…

MALICIOUS

PDF

85.7 KB Created: 2021-07-03 20:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ac0b4e52faa63e8c10664541b0361062 SHA-1: acfd781a7d393e4b1170887434b6c673a8282ffe SHA-256: c6c0511ce4887d04b43db5434d6e40b54ca27423cb8b0805c47bc31c9aa642ae
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols

This PDF file contains embedded JavaScript and multiple external links, indicating it is designed to lead the user to malicious content or downloads. The heuristic 'SE_REMOTE_SUPPORT_LURE' suggests the document may instruct the user to install remote-support tools, a common tactic for gaining unauthorized access. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://oniceh.ru/uplcv?utm_term=computer+learning+by+sumita+arora PDF link annotation
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfc218cd2d---wuxuvozowepukejavigejazej.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/83941109742.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/0cqk0unk56ujtchjjfn4m6qgo2/namixiwamekegopobesesu.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/02snc32is340u94su4brk5914i/72713359895.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/finifiwofonuwakupovibin.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/kikosuvivorifum.pdfIn PDF document text
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f68a4c0f5---35304795447.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021517819384533.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a5db8247ac9---27779390503.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbf134334e---wesutefatonu.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/3d322bbf670933f8437971742cac166b/giliwo.pdfIn PDF document text
    • http://clingac.com/d/files/40392731286.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/pujopu.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/ranilutovozupizeri.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0847a75683---28344104807.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099eff2e3395---lolajevomasipototep.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/38103371032.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/69241200479.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/a2ff91b2fbab34266f1e5d090c5c7ae5/rurakikadefamugizomibum.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/90563367832.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16081048eb3b99---tojapezapejijifozapox.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE905 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001011c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011C 10980 bytes
SHA-256: ce9d8cceace3d0f0ab7f5897cca3496e8ff53a27549b0bb8fba8df30986fa339
font_02_sfnt_off00011a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A61 18004 bytes
SHA-256: 92c1c071c8f209b15ccd890f2fecf3cdbedafe84dc83617cc1d5f82a3ecd68ca

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