Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd1acdde231c4eb…

MALICIOUS

PDF

92.8 KB Created: 2021-09-01 22:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5ae226eab5ed3e53a169b9b00dd4312c SHA-1: a2791b1a3dc9e3b8d2f1da2e4f02dc05b8f8afe3 SHA-256: ccd1acdde231c4ebb86e378c34ae1c84d217a679687238622ee95a5d37d55826
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to host or distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://uppercanadatwocylinderclub.com/clients/877835/File/40659590012.pdf In PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f18fcf69a---61661506722.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f823d556e5---78913922028.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/t89imv1jedc5dkp20fm4lri503/bapelexojarerovujoki.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/28638066222.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f4d6e0d670f---bewokusesago.pdfIn PDF document text
    • https://vzglavniki.net/data/file/memakejob.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/fc72d3ffc535a95368b84d1714c5d668/genonununax.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/28255266322.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160f64a005ab8c---38604106719.pdfIn PDF document text
    • http://rockycheng.com/ckfinder/userfiles/files/99755997344.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/71657200740.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/tilitaxejanelef.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/640e05a9486801fbca46a78d732e6b2f/sitosuxipumewurenu.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/44367709547.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a275c829681---74594186385.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2a7d935e8---kaletirutenidusesamutopo.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b0f757d05---36625975141.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/242d2c8227b766f689ef62911dff083c.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/46247019171.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/begusufozikoporuxexego.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/8epatcbhajahgh524f009qnug3/kotebijope.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/xujofadini.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610acba45c901---15203841165.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+export+pdf+to+kindlePDF 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_off00010634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10634 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E46 18336 bytes
SHA-256: a6f35434dcda61974d821f57994ae81d5cf5955cdaec0ca78474d67866615bb4
font_02_sfnt_off00014db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB2 10432 bytes
SHA-256: 0312b039fa1d8bae49cf81db766c5918ead263b147a166342ee22b02cc9af4a3