Malicious PDF — malware analysis report

Static analysis result for SHA-256 2776a851233d8138…

MALICIOUS

PDF

81.2 KB Created: 2021-09-07 19:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a8edf26a206737aeeb2d059300cbe2b4 SHA-1: a96004bc4b34bc45fe98589b2781722edbf1a7fc SHA-256: 2776a851233d8138c2e52a87faa71e4b7dd416226445795caab6da08f5f4e7a1
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, indicating it functions as a link farm. The primary purpose appears to be directing users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://rivaflo-south.in/userfiles/files/bobekomafelawep.pdf In PDF document text
    • https://flomogroup.com/upload/files/91173036064.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c889c1885d4---76293147853.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b79dfb5acad---76473164635.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/kegopazobidu.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/10942331339.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/1oec3dfo1nlnjp5m0h2r2oiit5/potixubepeduwaxilot.pdfIn PDF document text
    • http://artospace.com/pics/file/85975468489.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071bc0a6874d---23167186218.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/zibikukari.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/f0fb721401d07973afea834af19f4e1f/41864054932.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/budozuruwutatudog.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/pefidaziwutodagojikuxun.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/jazixipelepotul.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/vedadig.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/284921516e15138633782dd15c7a2078/turifexewogititapasuw.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/furirif.pdfIn PDF document text
    • http://elencostruzioni.it/userfiles/files/71923792597.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607190e6c1fb6---22300356934.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e75f398dd0---lunikuwesumenasunufo.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/62178991853.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d03dc6b8832---petepifotibimak.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161290e222acf2---7211612576.pdfIn PDF document text
    • http://schokobrunnen.com/idata/77278192261.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/71569588456.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=diferencia+entre+captopril+y+enalapril+pdfPDF 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_off0000d621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD621 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE38 10560 bytes
SHA-256: 8305eaa93aa9f7f85768a74f33e7796c0451495e21131ee1090ee79d1002f26a
font_02_sfnt_off00010667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10667 18628 bytes
SHA-256: 0602ac2779d7bb1b736e4a3bb216450b34c7d1bf4eb51fe57857ec768bb7e15c

Open this report in the interactive analyzer, or submit your own file for analysis.