Malicious PDF — malware analysis report

Static analysis result for SHA-256 46729157ce4fa62a…

MALICIOUS

PDF

95.8 KB Created: 2021-08-08 13:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 46f72287541fa72087388a278c27c377 SHA-1: cbd60b257c702b62d8eca53b5a99ab05a396b559 SHA-256: 46729157ce4fa62a20a76a406547335c5e88ce6b8f3ff313ef3400723a0c55e4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, directing users to numerous distinct websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary intent appears to be directing users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/39161630211.pdf In PDF document text
    • http://arniestribu.com/campannas/file/84416827899.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/27376100349.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/p22f3pqivsrle2g3d01u8oajs3/fovedegenenosowatomed.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/perowusevevadubaxetabe.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/25320032119.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a9db2abf362---fipurigufujusewu.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3c3857fb21d4d02a85341a9496b33081/24628041949.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/9diglurouukkp234qsishasbma/10919896580.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/16662649751.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/da13db120dc4d03abf5564396d690a8a/mefixoz.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/vudixozuk.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/8b95f78ecea31f64146b23fb9540fd95/8411205753.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/vagatuwululikiw.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca2cb15c59---86467245689.pdfIn PDF document text
    • http://metabolit.ru/files/file/fubalinawivasofazateweni.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff1578022d---36052731649.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4a9053775---10870271179.pdfIn PDF document text
    • https://medtek.vn/storage/file/66205844002.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/tamakuduramorun.pdfIn PDF document text
    • https://adikkedua.com/contents//files/922361802.pdfIn PDF document text
    • https://aathichudi.org/userfiles/file/pakarijiruxilurilad.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/f1bf3f6cc4ec7a6854e9f1bc9751026c/83377398250.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a145b8e0b4f---zojasaravuzonokaxotolu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=format+of+newspaper+report+writing+in+english+cbsePDF link annotation
    • 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_off000111cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CD 11132 bytes
SHA-256: f4b4163f6960bfd06e52e80b1dbc9534753522158c89c12d73d83e60bb39385c
font_01_sfnt_off00012b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6A 17364 bytes
SHA-256: 994b7881b613a53cd047d88dae0eb2fee8bd2659d47ad705e688370911eb6a41
font_02_sfnt_off000158cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1