Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1218e3f30ad5062…

MALICIOUS

PDF

69.8 KB Created: 2021-09-05 06:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: abe52227859da973198be6003822ad56 SHA-1: 272d7abf8d65e10d068600ee2cb1c134210cc8e0 SHA-256: c1218e3f30ad50626b5f1712ff875316562b01bcb25d74f1d79b2be78c01803b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://assisdrive.pt/userfiles/file/10939862254.pdf In PDF document text
    • http://muaah.ca/userfiles/files/7877367728.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/zejupif.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/336a7c61168345686ff0aeb6c1bfc8a0/29046338731.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/kenekozalevab.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/28220107006.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/746299a4a51967ca47f5856ca2d941c8/xutedino.pdfIn PDF document text
    • https://2acontractor.it/images/file/41481644367.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610528ef76682---zuxedalazuwolefenudorum.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd26868adf8---88836515040.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/jekogenukopil.pdfIn PDF document text
    • https://charteriraq.ir/basefile/charteriraqir/files/desilomozuxividutojerok.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202106200012585946.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/2b4d83c5249026fd3f64ae0f82298279/40183460909.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/03ba56a6fb50001538d8eddd7ecd786c/67232950265.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/9aaef2e5b4a0ff15ea310803c89a3c0b/57548295627.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/v8uk78dpue3hfj9otcl6r0cqtr/nularifijeto.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/43834875112.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/59974551360.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607669ed94181---25162056631.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/9992f3f8bfa695f575a57f4fb32e5fd0/safowerisumoxava.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/xodidetijexunukifez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=basic+aix+commands+for+beginners+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB34F 11116 bytes
SHA-256: 719cee8b8378ee5aff02747c7728d1a493bdb596b6ade500c7f39e0c08b77988
font_01_sfnt_off0000ccd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD6 14444 bytes
SHA-256: 3722817cbe201c0fde0759f84664a1ee06e18a94e5a5dec51c95e1c67ca8db23
font_02_sfnt_off0000f0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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