Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9369241c560b5f4…

MALICIOUS

PDF

101.5 KB Created: 2021-06-26 04:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ca1da463b394e2a594fdf36da8f4676c SHA-1: f50420cbe5be27e7d4b24f77a602b1d54c40a228 SHA-256: c9369241c560b5f4331186e70a6e0a15e92e801315a1cf11f880b0beffcd2c6e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, forming a link farm. These links likely serve as redirects to malicious content, as indicated by the ML classifier and ClamAV detection. The primary purpose appears to be directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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://allytemp.ru/uplcv?utm_term=sickle+cell+anemia+is+caused+due+to PDF link annotation
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c24329224ad---kuvotigox.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27b4a842ed---varokukejalimudovuritejaj.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da1e91f9e9---fuxosalomozidazoxuzef.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/t0ere019d42e2edjuhojliuoec/kefapikokodejajowovovelu.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/3eohuec73i5ncve81an4bs47n2/80549381265.pdfIn PDF document text
    • http://mountcalvary76.com/clients/9/90/9062e1c9f2360b2cedac6e2854879500/File/31058997164.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609924cc693dc---kitejopedipuluzin.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608201caeef84---fipod.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/88080d9fbd48862a911a637c04e2de6d/dunejise.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/b4047cf9803611b09ee66b0ecd377184/palivo.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/lusolaxup.pdfIn PDF document text
    • https://timjanen.se/anvandarbilder/53/files/databilokepurozagan.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a293f0d3a59---wapifefexus.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd46d768ca---59677492145.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/65140198fcd97b41f68680f62907adbe/15035381889.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/f7c62065933b30e720f071b6b43b61be/94036625299.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160710fb16762e---32746202067.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16071365e5743c---78554901098.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/jusovelekesavodelamol.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099a30e5e4f3---60328780471.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9927677ba---xenawatinakifuzikufimo.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/c56b77fc977424bbcd454cb701d456cd/povito.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ed99c2c78---45693439106.pdfIn PDF document text
    • https://tanthuantelecom.com/upload/fck/file/60068372889.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f3007526f---68177794363.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/9851556623.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_off00012c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C50 16908 bytes
SHA-256: fef6f0b94d8db483dd96f9cce94955190968d88e18029a38fe88017c2ef5f929
font_01_sfnt_off0001581d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1581D 10700 bytes
SHA-256: 1e5515420171ce851a323d6fa2c5c5e81e28f432128e6b88670b6a4ebe1afcbd
font_02_sfnt_off000170a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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