Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e9ecdda48e5dd28…

MALICIOUS

PDF

91.7 KB Created: 2021-08-22 03:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: c625202e40c52c0eda5a9d487576a746 SHA-1: 3e757fc3285743e6469a55ec0b5847abc35fab12 SHA-256: 3e9ecdda48e5dd280f6a05af2c2d5a8e0f76362e8dc268e35922a90b5d49780c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with the primary attack pattern being the distribution of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://forexinc.ca/upload/editor/file/93666311221.pdf In PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/0ad002f5ffe888e9d541fd68a99ed204/pazif.pdfIn PDF document text
    • http://chamdure.com/DATA/files/rewiweduleriduxosapete.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6f558f00f---vuwuxemone.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/fiborabudorovaf.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/960d18189408ce4f4ab9f68d1aa1b967/13951913340.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/zevenus.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/nedakadipi.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945dcbde36f---wezovetef.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609406d734abb---zawevubujowamusife.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/2ff88c41e6b31c81f88e5194beb1d0a9/97986781921.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/8edb1b565de3d33200dd43b79bab4c1c/32071423955.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/edd377bbc54735fe8a5c1ec51bb278ff/63294608125.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/pewajevew.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/lixagexibemidigapitezom.pdfIn PDF document text
    • https://cdmsig2.com/ckfinder/userfiles/files/90473546012.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/6813196858.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/23985795255.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60f0b1e7f6---zapinosibamafugam.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/20984007218.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/zigapas.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160abe2ab59f0b---93760151312.pdfIn PDF document text
    • http://leilehua76.com/clients/4/4d/4d80c013f15dbe3c797666a457780dca/File/fukepawijelenemosaji.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/mexoribut.pdfIn PDF document text
    • http://edgecs.net/documents/ginilapowatanufewexovan.pdfIn PDF document text
    • http://apismorava.eu/docs/81499323074.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=funny+60+year+old+birthday+jokesPDF 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_off0000fe7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7F 18280 bytes
SHA-256: 91c71ff837841f6f51adc3b2817b5542a2d88d1a47186f8de68c1d5c6b2a7ddd
font_01_sfnt_off00012cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF9 11188 bytes
SHA-256: 706b30835fac10182c97cba8c282644cb836b798b6903ad7388d92579bac2ae4
font_02_sfnt_off00014713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14713 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1