Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa81c96d767aff21…

MALICIOUS

PDF

88.9 KB Created: 2021-10-23 16:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-07
MD5: b72c03b26d20c4b87f4eacdbdcdceebc SHA-1: 811a85ce4c97362f20588a3f57aa07c395d0e125 SHA-256: aa81c96d767aff21078ca4e9f0c044de5342f6c0dfa019f693d0eee9ae43de95
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soluzionebenessere.eu/userfiles/files/mokegomudaroritif.pdf In PDF document text
    • https://mabuksusu.com/contents/files/kebudolululitozemovog.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/vifokonirikabe.pdfIn PDF document text
    • https://5udua.com/contents/files/karitozugukogan.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/77551566841.pdfIn PDF document text
    • https://nhatthiengroup.com/files/uploaded/files/89168217655.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/41795988276.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16135684c6e3be---kelatobomirajabipavusaga.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/79769113409.pdfIn PDF document text
    • http://stl-hk.net/userfiles/95350248444.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/44990111981.pdfIn PDF document text
    • http://adanamega.com/userfiles/file/4290503031.pdfIn PDF document text
    • https://nk-sostanj.si/files/file/28695022561.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/fofovipore.pdfIn PDF document text
    • http://cobansut.com/userfiles/file/98888471593.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/dubeg.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/89534745856.pdfIn PDF document text
    • http://formacio.fic.cat/uploads/file/16941643266.pdfIn PDF document text
    • http://mdtrend.hu/files/file/81065601494.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/fijalekiwituxapus.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/UsNeCLCzgYg/uplcv?utm_term=come+together+riffPDF 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_off0000f645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF645 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5C 10212 bytes
SHA-256: 84f81969445120bc31d7cb9ede24e7737f493d77ad63cbc0ca9ebe40663ed19b
font_02_sfnt_off00012543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12543 18620 bytes
SHA-256: b6a4054e4f4aece42e19edb0d06316ce85c27e52b753c20850b9df83c8e5dd46