Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee1ecb0fc10efdb…

MALICIOUS

PDF

82.1 KB Created: 2021-09-08 06:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1e13eb5a0f5738d15862add2e659debf SHA-1: c167377ddb290ff3d6e6aa73d89611888426386d SHA-256: 9ee1ecb0fc10efdb88b77c13c50eeb3ff45d2d20393884e341692ed62c113178
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable hosting. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://crewmak.ru/uplcv?utm_term=perkins+4+cylinder+diesel+engine+manual PDF link annotation
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/f587ad0b0e87d8a0daf57a3293b1269d/96161364989.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b910e15e69f---kavuzaviluxula.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/78386964518.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/73654122681.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/57c34v57tsd7paidimihf3up29/99272839843.pdfIn PDF document text
    • http://kozhencherrymtc.org/userfiles/file/91040194806.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/36979160678.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/74445580204.pdfIn PDF document text
    • http://wdnederland.nl/file/renodulemezipura.pdfIn PDF document text
    • http://kelvista.lt/images/files/timebidekekifijoliwumaw.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/sakiwaxorinagotapu.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/fnd70bhr76vdekl063dm2bv641/banixexojexidominarifeva.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/gorawugoxatirukixozuxut.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a3b55349c---zunaxarobari.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160841ac08d94f---78026950084.pdfIn PDF document text
    • http://suachuadienlanhhoaphat.com/hinhanh_fckeditor/file/zazatijosug.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/lipobobonagu.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/xinuvuladuwasubidaxiko.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160fb06cf1a33f---16743090588.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/06617ddddcdbb825f17e2728018a2715/88454702837.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3e5d0270d---59005500884.pdfIn PDF document text
    • https://sayurmateng.com/contents/files/46688774486.pdfIn PDF document text
    • https://smshealthcareservices.com/ckfinder/userfiles/files/xakanewelugudixebagixele.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608167b0ed8eb---47280107665.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_off0000dc3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3D 10880 bytes
SHA-256: f4727292e7dbe70cb63e49cc247ab8cdff20ba3e0e5bc1bcf76bdfadbb2f7f9f
font_01_sfnt_off0000f52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52F 17652 bytes
SHA-256: 088c4dfce82d1acedc307aaf36930bfb0dc56aad25d627cf3f082cd77ffa8ef9
font_02_sfnt_off00012287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12287 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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