Malicious PDF — malware analysis report

Static analysis result for SHA-256 415673f6b5dcb953…

MALICIOUS

PDF

80.1 KB Created: 2021-07-02 12:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ae5a645c3dde988d0dc6a9afc0c6f0ce SHA-1: 2fc41eba3ebd23cabd47270c338cce98b89b7e0c SHA-256: 415673f6b5dcb953b85c60d0569571d847556ea2a0419b4541c1d208191d37ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/orusj3jbfed677dqghvkhr6lj5/14175410088.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dac9d31f7b---50785777834.pdf
    • http://wittlich-luexem.de/userfiles/file/22855480724.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6c9188be2---zatejogikaparob.pdf
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/38190484033.pdf
    • http://quickvideo.nl/userfiles/file/49270229804.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1609984bea2476---retudezuminuzedepenexepo.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/48c2b3844c16a189344cb07f9436458d/26564249332.pdf
    • http://allycatering.com/userfiles/jiditabisugafulime.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49a8b09723---mofuva.pdf
    • http://beverleyannes.net/home/beverley/public_html/ckfinder/userfiles/files/18306253318.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/48d51a657bb173716fa32fc91f50d580/sixutavisowagarepisux.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/66j2ibiljm5am29lgba298osfn/29603198270.pdf
    • http://werkkledingverkoop.nl/images/docman/files/84372605850.pdf
    • http://vinhthuan.com/upload/files/63681957371.pdf
    • http://fixafilm.se/userfiles/file/72491588036.pdf
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/penozomokaro.pdf
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/81228243880.pdf
    • http://aite-materials.com/upfiles/file/foveto.pdf
    • http://stolizstekla.ru/userfiles/file/fujapisuralogomul.pdf
    • http://wannawwannie.pl/userfiles/file/rubagepemad.pdf
    • https://melz-feu.ru/upload/novonilikajenomedezowada.pdf
    • https://vigiweb.cl/dinamicos/files/file/mozutunugozowotogasuwuko.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/7368e42a7ac3d223c8843296f270ac40/vawewilokoxi.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39c6a9e69a---fisovekaw.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=flow+cytometry+solutions
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7ab.bin
fe04c8a13db344dfc5e7eb71cb0b467e14037551299cbb47aebae0ae84697f29
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AB 10508 bytes
font_01_sfnt_off0000efa0.bin
8bf2d7311ade38b9d796fb784b2d7b84840170e01be30737b465d5c5c249fb83
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA0 16704 bytes
font_02_sfnt_off00011aed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AED 16792 bytes