Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b9bb82bc5e21dc…

MALICIOUS

PDF

81.5 KB Created: 2021-10-07 16:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: b4940d8c3888876157d3ab6ea07fa1ac SHA-1: fc2e9092283c6f4ab950d8afb17e7f0e1e5cc8bd SHA-256: 72b9bb82bc5e21dc63476c16f55e75aa7061c062adcfb70a314da8a757ce2a42
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=anaphase+1+and+2 PDF link annotation
    • http://tataservice.it/userfiles/file/94797390515.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16134d5ef8093a---xodofapulolawawiwutiwotu.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132def119e2c---tegixufekofuj.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/69436305470.pdfIn PDF document text
    • https://yakin-surewin.com/media/file/19856080154.pdfIn PDF document text
    • http://kompassztuki.pl/Image/files/64535371164.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e10560417---puvubenoguxojujumamudas.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/79297495890.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161564e0191783---12769060920.pdfIn PDF document text
    • https://sarvodayasamaj.uk/upload/files/kedovonukuwewuwin.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/658405163.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202109151554004857.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4ce944812---94846143963.pdfIn PDF document text
    • http://pro-roubenky.cz/UserFiles/File/dakaz.pdfIn PDF document text
    • http://kite-surf.sk/files/40870081367.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/xakifeguvasusejuze.pdfIn PDF document text
    • http://dlabiura.kbo.pl/ckfinder/userfiles/files/27804762810.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/paziwa.pdfIn PDF document text
    • https://coop-alternatives.fr/images/images/gomikunezebokuga.pdfIn PDF document text
    • http://petrduchek.com/files/96538118463.pdfIn PDF document text
    • http://www.romanschatztruhe.de/img/files/voweporagug.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/76651698379.pdfIn PDF document text
    • http://tanabuauto.com/js/upload/files/43698728888.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/25153255268.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_off0000da4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4E 18248 bytes
SHA-256: f0e0332d65fdf9a5f634e99d4e39b3f89048dc9b667e8b43b99ea37a3d2337ef
font_01_sfnt_off000109b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B1 10188 bytes
SHA-256: 5a9ab79233b9d134ef42393be2d59cf29c2a6c307d29f0ace57c3f769fa0cf1b
font_02_sfnt_off0001208e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1