Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9e949085c87253…

MALICIOUS

PDF

101.9 KB Created: 2021-07-01 14:21:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ade353679db2198632804b7fa6837e26 SHA-1: e94e1411b41ba2d4eab5febcb7fa5e83283a3d17 SHA-256: 7c9e949085c87253e8546192d878f24c3e73b8900ebe2f7ea84e7932b1d0a713
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to act as a link farm, potentially for SEO manipulation or to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://krisoc.ru/uplcv?utm_term=muscles+connected+to+scapula PDF link annotation
    • http://firewheels.pe/userfiles/file/ripukisafufukorutipab.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c3bec02d7---77648493323.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6059eabcd4895798bbfc721d8fefd7c2/bosukininopezilimu.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/14311348286.pdfIn PDF document text
    • http://abwrva.com/uploads/files/82706867877.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160adb17a42dff---81141409147.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/22hs50j46e4i0kca75t3910820/nutixugobadepe.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/5cc1f92ff046eee55c3a8d3c39759429/tobiromawavumatepijuxuru.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/97105714540.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/95485191277.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/40229313645.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160775636dc7fb---87928024192.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/nabixanulukefokokikazi.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607169ff34ccf---16074956785.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5003fc8f6b---73211886049.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607140d12a24d---sutafekuzovoxis.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608dba5a2f7aa---fegike.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/t5dud4dtotg5ggsonm98i27jlq/vurozabuku.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/vefafuxepivalubizusarup.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/f7d30f9bb9eea99456983a77278ff0b9/78114218321.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/13f974379d2d4f0bfe5c87f8da4e7b29/14512726988.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/daperazevi.pdfIn PDF document text
    • https://paperland.bg/uploads/file/86250513561.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_off00012556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12556 21060 bytes
SHA-256: e0f8077902ec75f35b31dcf3d8fffa09440b41b4708a29b8a286af85d727c58c
font_01_sfnt_off00015a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000172a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172A7 10408 bytes
SHA-256: 529c9a4428abcda877f896e0c33c73b98fdcab0677343a2e1a91bcbc52966a0b

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