Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c7f586da443062…

MALICIOUS

PDF

72.4 KB Created: 2021-09-15 21:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 816f7ef6e9f5bfd840b6c847d2e8e89f SHA-1: 2c7aa54be60646b7fce8bc9ddc919b93edf8856d SHA-256: 10c7f586da4430624844df403227c1a2b0d960fb4ffbcf4ac2a2d0d3c48c0b76
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicative of a link farm designed to lure victims. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were extracted, the structure and URL patterns are consistent with a malicious PDF used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://flagrant-desir.com/userfiles/file/milizigegikaligejezegatoz.pdf In PDF document text
    • https://anninhsieuthi.online/upload/files/nuxabilorunef.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/sanutodawamusewin.pdfIn PDF document text
    • http://lechioutdoor.com/userfiles/file/29619643418.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/82994630634.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bcba55578b---77395363949.pdfIn PDF document text
    • http://czernavendeghaz.hu/admin1/file/xemolak.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c240eee64d---mokonamigow.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613c94a7d4232---bozabasuwow.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/jitudanejivivoxarezusup.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/xorinam.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210901230651.pdfIn PDF document text
    • http://dmychadla.eu/UserFiles/File/vovujajumej.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/60838084414.pdfIn PDF document text
    • https://ksboutlet.com/file/files/jikusedamikezadarakixu.pdfIn PDF document text
    • http://irths.com/upload_files/files/22696998620.pdfIn PDF document text
    • https://ist-lb1.istanajp.com/contents/files/vavepefawat.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/tclj0dau78vc6q7vql60t8m5a5/27332526175.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/70506795192.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/64794814607.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/xetavoki.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/15247449871.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/45404353014.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/1b28095e74eb6a6b4df484ab53afc836/lepabafo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=turbo+fast+vpn+apkPDF 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_off0000ba9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B5 10440 bytes
SHA-256: 1cf7765eb5f7b3c6f802c7167fde8aa7e3b668dae80890a915d8c42d7e7d7e8f
font_02_sfnt_off0000ea5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5C 16292 bytes
SHA-256: 75f361bf206456dd85f68cb8927ce911ddac904582134ea635c7367c905ca77e

Open this report in the interactive analyzer, or submit your own file for analysis.