Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8704bdc9f71570…

MALICIOUS

PDF

88.4 KB Created: 2021-09-05 08:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8e9ffe929b0be133d3ddfd3cbd58d1c3 SHA-1: e41aae14c2e86ad434ef1ddffe029c03cfa22f06 SHA-256: 2e8704bdc9f71570f797c9fa0c79a7166e10c8e9216d1716d4e52a18d323ccb3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to various compromised websites and potentially malicious content. The presence of numerous URLs, many hosted on compromised CMS platforms, indicates an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=basspal+ipx7+manual PDF link annotation
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/37834996140.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160c039f94329f---wuxetowanagowuki.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91ad62a113---57937696558.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/25058519225.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe83258d94---kubusibowede.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/paridogimomidowikulomi.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/47178734031.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/f46863bb7c6c6632d2ed6200cda151aa/82164079584.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/33517211555.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/71a8dbdb148ff816ed773dd4de5e9b28/84927860148.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/80556186222.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/76931778107.pdfIn PDF document text
    • http://dongphuctqueen.com/upload/files/32880483791.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/duvizepexetakinojebaweg.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/wokatagopanazexesa.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/lilijijedoketoxe.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160949eec72dd7---35263458655.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/f632754af09b0251c4b7a743c1108510/51545280917.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/kafexubiburusodalojude.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/19dm0rjgmjvlua9cuv46mheu3r/menaji.pdfIn PDF document text
    • https://mvservice.it/file/rarekuvaxusifadarogabin.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ac7c39c89---46454271824.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/sopapesuzedevezekijaruzek.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AE 10268 bytes
SHA-256: 043329573530784d5b7b222bc746401a9be48d491f2cabd6e198dbd3df8385ab
font_01_sfnt_off00010abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABE 18572 bytes
SHA-256: cc2215891d54f95c8dfdc8eb066a9be7af1d4e4cc0fcd95a83ffea2425fa30f4
font_02_sfnt_off00013b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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