Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc94c9f37777c9ac…

MALICIOUS

PDF

88.5 KB Created: 2021-07-10 14:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6bd21307162f1d14371956a39dd76020 SHA-1: e6aa9d0277509f28ebaa5c9e7ad4517ef641b8a8 SHA-256: bc94c9f37777c9ac5b97df788ad9e67e5f24be04f9405be4c4394a4b5c50eb3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URLs are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://medvor.ru/uplcv?utm_term=reading+and+writing+grade+11 PDF link annotation
    • https://almuhja.net/ckfinder/userfiles/files/31746570249.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608400249429c---57383894992.pdfIn PDF document text
    • http://cityfate.com/files/files/10673687748.pdfIn PDF document text
    • http://gruppocinofilomarsalese.com/userfiles/files/xiveminibesoloramijafe.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/5hafu399du7f04vbgdk4t4vc11/tilifigatiruwolotafemug.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f9880b44a---rixojejirori.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098d474e7fba---41901598744.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce6b8cc8bb---dozidawobuvumesu.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/89689236364.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/97538488092.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/38318929345.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd646a0bea---38162695092.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/tsgno0geqmn30opogmsb38ia2g/38768418502.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/930d2131860b5b76bd1f63a5258258e7/kobulaz.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bab13e4ae---nebewusogizoli.pdfIn PDF document text
    • http://dentherapia.hu/files/file/73909686077.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/srnlrufvicn5ku7mucngpisamd/vosufimixoxelosas.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/vizajujopenanupozepifomi.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711fe713997---68679972965.pdfIn PDF document text
    • https://tisuputih.com/contents//files/6120408652.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6722c6d17---gobosodeso.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cee96fab075---benire.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_off0000f9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B2 16780 bytes
SHA-256: 8ad258b53e7f0b73987cfbd4bd8663c622bc877512bfc65d00328bb34ff3721e
font_01_sfnt_off00012573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12573 10272 bytes
SHA-256: 18fe5e8ae4158547ad0c0462407eb0757c6da47ccee7d2d5b7efd8241cff2a72
font_02_sfnt_off00013c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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