Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c72a8724c901a3e…

MALICIOUS

PDF

89.6 KB Created: 2021-07-02 21:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7ae179b809b0d129b26bb416c0d8a295 SHA-1: 74afbc7f9ccea1381cb7f7396517ad156ed14783 SHA-256: 8c72a8724c901a3e695949eeb867d0f4c520a3cd1da7b68e10c0996d3ab62e5d
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=video+converter+1080p+to+720p+free+download PDF link annotation
    • http://rocb-ap.org/file_media/file_image/file/vigujekufiposig.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec47b412c2---badabaribun.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb49ce4bdf---vusavedoratesiwatepum.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b741e21ec9---seledodunofizusoz.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/wosewogijuwapavedogon.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/dekovukag.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/zodumi.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/82480537373.pdfIn PDF document text
    • http://sakem.org/userfiles/files/79927117248.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/gugiwosatidanamegiba.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/53580638109.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/4557969613ea26cc27cc872e120fb283/buzalatowizumovirisezowe.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac0fa059ba---sirisawurugutegevomijubu.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/4826117452.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0f309eced---torewumupefuxoginexatobi.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/nco6t83e888c8pgu3kicn9oeh1/27501930988.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c66dd0a773d---meludotasavebitejavarese.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3481c8b1b---zurunasirapovet.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/67263077213.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/9b9f6f24884d134ae4a8b1c8bed2fd25/5226534613.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fff9a7f46---73912055317.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/94837200425.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/bbo98n4a0b13hi71ulf0old3i2/72294679951.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/78082826453.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/0b96c2ab380cec87ed1b20c35fdf9e51/weworamegonipirebagapeka.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/41962975044.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_off0000f991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF991 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A3 17136 bytes
SHA-256: 33f472e7a295b9b7e35152a9aca316d4edc4d6a3b36e44cadd45ec75503d4594
font_02_sfnt_off00013e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E52 11120 bytes
SHA-256: d2ee2464b5bdeddf7941944d2a6205abe54cdcaa3c4efca46156cba8664f66b8