Malicious PDF — malware analysis report

Static analysis result for SHA-256 bedea175457a223d…

MALICIOUS

PDF

83.1 KB Created: 2021-08-21 19:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d6c22683cfc66068218790f73dbf6343 SHA-1: d9a38482afcbf09f2b84fba38250c5cdaaed12e0 SHA-256: bedea175457a223dd12f945700bbf1517abe874c44c84be6ad0d4c0731044c64
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript is likely used to facilitate the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://snoman.mb.ca/ckfinder/userfiles/files/76166488017.pdf In PDF document text
    • http://tamlaproject.com/userData/board/file/67656154905.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/f09645a9908ae50e3d168a5d8294edd7/69823987010.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/dc434cdeb0d6dd621bd83f1db2169df0/52179420762.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/0m21p2r1q33pfuf1gh3pfhm6v5/34988617581.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/f9c69ee2f591c0848875690b616c54e9/41458951601.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/985625ef0033366cf04b95347617b081/liriwidiniru.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/zebikidazig.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/56023270154.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/11def1172106804728ae252767101b7a/72968900029.pdfIn PDF document text
    • https://callalilyvn.com/upload/files/xefoxasiboligubar.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/geravolaxilorifeni.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/4ea707cceff32844601fa2a3e63fd61b/bixixixugesedavusa.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/xuvodomejami.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16088507edfc9e---zudebamamosoxotezarevosek.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/35263581465.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/76981355913.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa66fd09b7---besumafewov.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/cfda1bb7bb7a223c985066d87e44ae78/80266173683.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f2cae901a8e---sebosapepajamulepigi.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160731d1d90772---boleraresujomevojixolu.pdfIn PDF document text
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/zibefaxifabazi.pdfIn PDF document text
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/dalifukubivaw.pdfIn PDF document text
    • http://navigator-33.ru/media/file/27971430283.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=nelson+mandela+university+prospectus+2021+pdf+downloadPDF 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_off0000dc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1D 16864 bytes
SHA-256: 4a7ff4bb226934a44a716a3c2f1e380eb2af80199acfd51e8017c956e5972fb3
font_01_sfnt_off00010831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10831 11420 bytes
SHA-256: fb08f33014c03cfa0f4af23efc78cecbf560232c4da2d6773825c43518af00a8
font_02_sfnt_off0001234c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1