Malicious PDF — malware analysis report

Static analysis result for SHA-256 932b5cd1f208373a…

MALICIOUS

PDF

87.6 KB Created: 2021-09-07 06:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dad3234d83bec4556a328a8e320b2d2f SHA-1: 814ced93f7d09462af757b11bb9ccedaf74688f3 SHA-256: 932b5cd1f208373aae2a1d3fb4ed18cef4e4ab51e5811da96dfb7bdf18661c7d
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing sites. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/jl155a7dcnot85d1t8h0emkctt/95715553511.pdf In PDF document text
    • http://islandpointfl.com/userimages/82972314661.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/b3e440351e0940702210e5f221f90787/75437043625.pdfIn PDF document text
    • http://richwoods1969.com/clients/861079/File/gesomamiwigepuwuz.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607831853612b---tamamiguvekivig.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/gujikivav.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/12929529592.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608230a70f587---badebavopogonelojej.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/2d268f708d114ad26704f1888b73ec8c/392159572.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/zikigafumovavixazexejobu.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/4301197621.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/k2n94miogrb7u5sk2ujevbbu42/96979089398.pdfIn PDF document text
    • https://asiabiru.com/contents//files/wezopazisejaguvesu.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/2df850bef5259a3393f220b34bd40062/titowi.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0e5013fca---liwefetupomakulapu.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/d47508d470d8a3eaef543cea394097d4/48716211620.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/f24lgbd5r0vj0bgp8qmv9bm210/13755670263.pdfIn PDF document text
    • http://melodylavernebettencourt.com/media/file/bemuvakizuxoz.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/viwusoganakuporelok.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/427d8e88e3dc61286671f2c21f9dfc41/93737279555.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/6n79st1ens5mfpqneesl723fs2/viretozu.pdfIn PDF document text
    • http://rc-modeller.se/images/file///gilubevuxafadip.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/jepezoxerurevinakopida.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=anterior+ankle+impingement+exercises+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_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 17504 bytes
SHA-256: aeb3a2585c4602f4637520043e6efca21bd8993ce2304eaaa3ea24bb08e6de57
font_01_sfnt_off00011e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6D 11140 bytes
SHA-256: 1c69d6c2b8580ccc6f57770f391561f955462f7961f8233dbd8b8187d6e48b49
font_02_sfnt_off00013845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13845 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1