Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5c092e8dc9ae3a…

MALICIOUS

PDF

67.9 KB Created: 2021-09-06 17:32:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f9677962a4f600a4a61291af1bf9c159 SHA-1: 0ddb205812e220a6dc9124cfa86ac04c1a75f193 SHA-256: da5c092e8dc9ae3a975148908d8b3c492f051f812687c0257e52a366971f4978
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable domains, which are likely used to host phishing pages or distribute further malware. The presence of multiple links on potentially compromised WordPress sites suggests an attempt to leverage SEO poisoning or exploit existing vulnerabilities for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9415

Heuristics 5

  • 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
  • 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://yournew.site/wp-content/plugins/super-forms/uploads/php/files/gpvo4lbhqvgo1k6vii5ub8ajj5/26212462267.pdf In PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/jikaxovetivizatenivov.pdfIn PDF document text
    • http://jainfarms.com/uploads/visewad.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dfc44bb4044---54433329849.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e4f68a2d3d8---fibagifojapamuv.pdfIn PDF document text
    • http://allycatering.com/userfiles/85308970672.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/37153775667.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/61116178407.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/45334003921.pdfIn PDF document text
    • https://gencatakan.com/upload/file/21885501537.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b88cab3f78---jawilitinozutaki.pdfIn PDF document text
    • https://nileagriculturalindustries.com/file/vudifor.pdfIn PDF document text
    • https://chp-travel.ir/data/file/bijevonijid.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609150f7a8e78---tomevejefegulaxeni.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/senamoluguvirasadu.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/pofubemodox.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/332248a9d54f2c96d927b056f76f2724/juwajed.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/xofufopesenumeziba.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/69258154960.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c04c655a9ac---xikesozenukidi.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/l4jjtri0rls11jfac5usddmsab/3273003280.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607682f86369f---48100403437.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608611cd2f933---90640051679.pdfIn PDF document text
    • https://rumputhijau.com/contents//files/28553003196.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=tipos+de+variables+en+una+investigacion+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10C 18492 bytes
SHA-256: 097fda2843d1634e75e41314d011af8e25208109ae9620241ab03f67275d088f

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