Malicious PDF — malware analysis report

Static analysis result for SHA-256 df07ca54fd17be32…

MALICIOUS

PDF

97.7 KB Created: 2021-09-05 09:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9f907aa1f6edabbdf498d02a68dec81b SHA-1: fddd4bce0202d0fb9c555f6dc052f75487199f69 SHA-256: df07ca54fd17be32bd5b52add21e3512b740ac55642f9b4f0166dcd20306256a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

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://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/a2gnateiggco414bcnjfdais7u/86137724476.pdf In PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/nfm8mabgpkah5gubrvq9628ph5/81555657284.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/nanuzisizajobabuti.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/pevovuxizasupuve.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16287552572915.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16259090221233.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/54912400544.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907589a227a---72285992313.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/kutanubixepesimiriguruz.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/47169727860.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/99171976564.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/faloluju.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/69103171491.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/vakazaraxoruroxubosox.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/8dc569f36795afa382d5a3f2f12fde20/29452246414.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16119c852e2d42---wivigafojilanalilagoxobif.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/ee340eeef2e8f74301317eab0ffcc592/vugoxilixugezi.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/7e9c843fbfd5b551bddff44609872508/60776887530.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/74831227771.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/02cadd79417e789d52779949c8b7b1bb/kopimejegi.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/mebonaximanetesibilajejak.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/4349e6882a87d60b1da8fef32769d9f9/xutivuxajatezi.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/460cdd16fd7056a84a38c3b7173cebd0/22421835486.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=rte+act+2009+pdf+downloadPDF 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_off000117e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012ffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFC 10792 bytes
SHA-256: fbf01db164b6ce52655885145a846b37343ac625c9e832b57e36dbe28af0b4d2
font_02_sfnt_off0001491b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491B 18192 bytes
SHA-256: a5fbfb766c4be3a9a8fe5a7684e681bfbc2d7a4eea4534f3fdeff27d824a3242