Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd8895b977b44c7…

MALICIOUS

PDF

81.0 KB Created: 2021-07-03 05:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: caeb4851885da9a5bd9d4d68ebc6fc30 SHA-1: 8c69fa8a580e489ba1ef6c8b6469d1143db8cd29 SHA-256: fcd8895b977b44c7ee06f7c3470eed2eecf769a3326f2b5e4fefc478dec445d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on compromised WordPress sites and disposable domains. While no scripts were explicitly extracted, the presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics suggests the document's primary function is to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://crewmak.ru/uplcv?utm_term=amidst+of+meaning PDF link annotation
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/c1d5c618919d8c4859f88b59a38cf495/bubazomimejamolomosexaj.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14c966f5be---fubesisagexivone.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ade1a9e67---38179062923.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/27760888437.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/fb7ff8adacea99e85cd51e95158a8ebd/fefisumizugajufodusi.pdfIn PDF document text
    • https://cmsschoolkg.org/userfiles/file/vekapisikesiro.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/92687413142.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/q93137cplob4e9tsjhga813s2q/gumozudu.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/5039922721.pdfIn PDF document text
    • http://webursitet.org/Files/file/76084014537.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/9578105092.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/tesulilirekasiwarun.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/16874719510.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d01d55c8253---devalolatuteneruvava.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/a45c17e97da2633b98c180865f608ec1/nijekeri.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/n1j2kmild98fu9e95q91urvvm9/45649357231.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/te42vjcqbvlfitbudgrs6latvg/juzafelurofaxubaguxapus.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/veputiroj.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c15902c565d---sowazukuk.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16077b7cc0e0dc---lapodonudokuzewitaturi.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/ed9fa1871fca4655ecb6a33d95b9f6a5/90074731426.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/6oe1qignpbkjspra6n1hn1j5rv/gudejav.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/file/giroxugewuvujovajujos.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f9383ff43---mifepegolojidojazi.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/kufetu.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_off0000d735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD735 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF47 17924 bytes
SHA-256: f390885441a06f84d0271c74e0d89c0276548839f136774d7d716c0a0e1c61c5
font_02_sfnt_off00011dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCB 10532 bytes
SHA-256: 414231b37b6776dd8bf57cde28f2c6728465e063f17b4305b7592c67f6dbfcfc

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