Malicious PDF — malware analysis report

Static analysis result for SHA-256 5630783505d701c4…

MALICIOUS

PDF

197.2 KB Created: 2021-09-07 12:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3bde6b78128ce8328e6320ba91fc8cf1 SHA-1: 4fe4dffff63d1bdc6ede573561b8736b608c8315 SHA-256: 5630783505d701c4b2cb9dada2e92b868314cb99e096a94264601c5ea247db72
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a link farm hosted on a compromised WordPress site, specifically pointing to a PDF file. This suggests an attempt to lure users to a malicious resource, likely for phishing or malware distribution. The presence of embedded JavaScript indicates potential for further malicious actions beyond simple redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7825

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://bizbecho.com/pa/trainstation/uploads/image/file/fabusesize.pdf In PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/982d0a5655d5c3450eb67debb818a9da/bamisawiwaresulifuni.pdfIn PDF document text
    • http://lighthouseofworship.com/clients/44803/File/63448597886.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/bewusodet.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/68913514262.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents//files/bebefokakosu.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/5824228110.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/25504447419.pdfIn PDF document text
    • http://kme-kme.cz/files/file/jisigexukujumax.pdfIn PDF document text
    • http://airmon.hu/images/files/43470390145.pdfIn PDF document text
    • http://mertlakustika.cz/images/pages/file/nojakaxawe.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/46702322794.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/0f906932e1ade2741429b2d9501b1e8c/libajanogus.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/bizakuninaxozax.pdfIn PDF document text
    • http://fields-on-earth.com/images/blog/file/bejozedeb.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/63975548376.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/47144415737.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/a5bah85p8kjo69hvddi9rnbk5r/pasedomusi.pdfIn PDF document text
    • http://namlongprojects.com/images/uploads/files/vedaravusulalozifuzadowaf.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/93222582490.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/9a44fadac01dad617bd7ad2feae2bee2/gemalajamedobenimin.pdfIn PDF document text
    • http://friend5190.xyz/js/ckfinder/userfiles/files/44472592104.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609846d21939a---fixetazukukiveponulu.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/mozifidowivikapo.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612869faf3168---naxisuxedomud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=stihl+ms+211+c+workshop+manualPDF 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_off0002daf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DAF5 11032 bytes
SHA-256: abaed9aac8aa5bd80eebda32c5536fab394e72ebf6618dde2e1eb0295ea94f70

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