Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e5eed950aa1da5…

MALICIOUS

PDF

95.5 KB Created: 2021-09-05 00:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: db1ebae386482cb0f5543d5712b5b0b5 SHA-1: 5e770ed4dd5d01728d5e4026d9a93566c046aa29 SHA-256: c9e5eed950aa1da5f19566d89b272ecabd31d43c5b6491b261a6a0c810f42b8e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, presenting numerous URLs that lead to external sites, some of which are hosted on compromised WordPress upload directories. The document body is unreadable, but the heuristic findings strongly suggest a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://inprovit.com/ckfinder/userfiles/files/1080216808.pdf In PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8865e3c92---supide.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/mijigakimibumo.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/79inegm1ol32mdvv4n9o2dpe5h/guzajobinaxalixuxovamo.pdfIn PDF document text
    • https://listapp.in/ci/userfiles/files/xaledegotug.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc1cbd26c1---zagej.pdfIn PDF document text
    • https://ovistar-dz.com/ckfinder/userfiles/files/46764037673.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/sozivubatati.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/9fc37a72014423a74efdb3aa55a52855/zobufupamepatobugijite.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/fevumipu.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/47e61d87d7ab20e9580eef47f6ef7100/bafumorisagibivolameg.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/10526894269.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/ic9o58avuhub0ohtsv1ssasvko/63213169736.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc1e5d0a66---29880947925.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/51365578721.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-7-21/20210721221812952286.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nurrdghrina4jrsmagotg6dah1/70254437545.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/60965689195.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a237cb1830---56674691895.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160872706f2883---xijuki.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/gipisunizuwetagerebepev.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/35581593360.pdfIn PDF document text
    • https://caraudioshop.ro/mm/file/xewixevofosozorurukevev.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/nqepamtbk1g3c9vbof3jmuq770/72350176001.pdfIn PDF document text
    • http://steps4cancer.org/clients/a/a7/a78c374070a178914b502abaf3db82b8/File/batazuxatulupavogiluteb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=mobile+pdf+editor+onlinePDF 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_off00010fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD5 10296 bytes
SHA-256: 56e2298b8efd7129ab05ad509e1f25341b8f9ce98299b60bac2cf3d7b829a190
font_01_sfnt_off000126d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D2 18924 bytes
SHA-256: 8827500c2467fa05802ea5d73a384cab030e666968db85e2ed8ef9ad899f22c1
font_02_sfnt_off00015853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15853 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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