Malicious PDF — malware analysis report

Static analysis result for SHA-256 de461d843df0bcdf…

MALICIOUS

PDF

75.5 KB Created: 2022-04-15 07:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-04
MD5: 7ef33274f6256f4115ab7e7841fcd22f SHA-1: e036de76df8ffd25b2f7084db8e971b6bd6b93be SHA-256: de461d843df0bcdf0ccbf5dc22a08d78405057968a782adbb08d9af5f7ea6b80
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to potentially malicious PDF files hosted on disposable domains, indicative of a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed to host malicious content. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.jasolasia.com/image/upload/File/2026929990.pdf In PDF document text
    • http://teakdeck.pl/files/file/12125303874.pdfIn PDF document text
    • https://aqua2go.pl/galeria/file/deziw.pdfIn PDF document text
    • https://tifutijije.weebly.com/uploads/1/3/2/6/132682998/9592857.pdfIn PDF document text
    • https://mozipode.weebly.com/uploads/1/3/1/4/131437967/1865239.pdfIn PDF document text
    • http://tugrabilgisayar.net/resimler/files/98481786985.pdfIn PDF document text
    • http://casio.tw/upload/files/wopusabugizuluwujewosaxu.pdfIn PDF document text
    • https://inayatinterior.workstatus.in/images/file/tulajegubero.pdfIn PDF document text
    • https://teraxamexad.weebly.com/uploads/1/3/1/3/131380600/vuluzipopobog.pdfIn PDF document text
    • https://lum.windscrm.net/files/file/60905926562.pdfIn PDF document text
    • https://fadoxidibeja.weebly.com/uploads/1/3/2/6/132695582/7062288.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16225aceae9502---29369615664.pdfIn PDF document text
    • http://skupka54.ru/upload/m/bovutudojotuluberufe.pdfIn PDF document text
    • https://kutabafimuv.weebly.com/uploads/1/3/1/3/131379381/ponorodujorasoxomimi.pdfIn PDF document text
    • http://ageddfjtj.pretty-match.com/upload/files/pavanamekaseraneneg.pdfIn PDF document text
    • https://stopserv.ru/files/file/84974788505.pdfIn PDF document text
    • https://barefoothoa.com/webroot/js/ckfinder/userfiles/files/63327286255.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/pufojosobotemuboxa.pdfIn PDF document text
    • http://chmer.yun2u.com/upload/files/27761500715.pdfIn PDF document text
    • https://riximuboderex.weebly.com/uploads/1/3/4/7/134744564/diwupajinafawodilex.pdfIn PDF document text
    • https://fusopozosasotex.weebly.com/uploads/1/3/4/4/134477759/fufasolo-juvota-duzamexiku-dulazosoz.pdfIn PDF document text
    • http://pokrowce-ochronne.pl/Upload/file/fagotodavezuw.pdfIn PDF document text
    • https://sunuf.co.za/YmrXLWy8?keyword=procedimiento%20de%20administracion%20de%20medicamentos%20por%20via%20oftalmicaPDF link annotation
    • https://xugasejesakegeg.weebly.com/uploads/1/3/4/6/134617370/53edf.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 extracted file (font_00_sfnt_off0000c1e3.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c1e3.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E3 17852 bytes
SHA-256: 3ebdd29cab4d7e7ab061eacccc0e31ed21fba4b390d05d1a77fcc12f46dba0d8
font_01_sfnt_off0000eebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBD 10848 bytes
SHA-256: 9b9d7ad90a1337d1f170f15c7c946021215e5505b96a74cf2e5c97e610318f07
font_02_sfnt_off000107cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1