Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99ff4831cd617cb…

MALICIOUS

PDF

80.8 KB Created: 2021-09-09 06:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: 20bc87ac8660ef3c2e1f6ef68c058f12 SHA-1: eaddea2cf6e62a276d6f738fa56866bbd1f888ae SHA-256: f99ff4831cd617cb2242b91eafc40a595e34f429fe60ae4a850b53b820143b61
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://veiligheidssloten.nl/ckfinder/userfiles/files/govepelumanowiziju.pdf In PDF document text
    • https://felicityokolo.com/file/badaxokizudobijov.pdfIn PDF document text
    • http://healthywithhart.com/res/file/44693024881.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/makefux.pdfIn PDF document text
    • http://perksys.com/userfiles/file/beribulopuxubudog.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/giwaropuwitujibusitasa.pdfIn PDF document text
    • http://theflowermaker.com/uploads/File/44349103118.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/latoparu.pdfIn PDF document text
    • http://cocoon-source-harmonie.fr/public/file/doget.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/didizigatutobasokodofeso.pdfIn PDF document text
    • http://facyt.com.ar/ckfinder/userfiles/files/14430094460.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/juberiwovarebide.pdfIn PDF document text
    • http://ensky-chemical.com/upload/files/numuso.pdfIn PDF document text
    • http://haai.org/upload/file/80595898986.pdfIn PDF document text
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93400244136.pdfIn PDF document text
    • http://metzlerranch.com/userimages/lijupijavosononufasogupa.pdfIn PDF document text
    • http://synergienetwork.net/userfiles/file/50877549812.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/a9d09f762511e400b813696ecc0ebe68/54793664316.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161334e8732093---doxesemaz.pdfIn PDF document text
    • http://limuzine.md/userfiles/file/71348432581.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/41816414431.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/5pvs8e6ehul0hadeu2ouckac7b/14199883836.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/ganoja.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161394f8c19d76---48238239888.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/p2b866jc2elea7apmsm2oj4n36/ferobixukejog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=sky+news+for+androidPDF link annotation
    • 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_off0000d50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50E 18356 bytes
SHA-256: 7ea993198724596c004687444e1956b1419151d3839a3461888a987ad83e4a49
font_01_sfnt_off00010506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10506 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1D 10568 bytes
SHA-256: 2474b0cbd4dff0a93b2da444d14349a4bfd02c3d02b32d3e858881439d1a3529