Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ed4fae20a8ee74…

MALICIOUS

PDF

69.7 KB Created: 2021-10-03 17:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 103b95820d4481c370fc235a9bd42183 SHA-1: 46772f6acd3f1a2b3a967d0d791be39ef600b680 SHA-256: e0ed4fae20a8ee74790a8e9fef962db2747f5986176d22046dd572019cb9eed3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to PDF files hosted on potentially disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading unwanted software or further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • 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
  • 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://www.supair-lux.hu/ckfinder/userfiles/files/pelagozugomalu.pdf In PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/zikabogitojuwe.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83499747258.pdfIn PDF document text
    • http://sintjorisparochie.nl/userfiles/file/75643994418.pdfIn PDF document text
    • http://aven.su/userfiles/file/punenuja.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/nofosijuloxatigasomejiniz.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/72812872654.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/kepusewebazunalebilamu.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/80699431663.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/vedabiw.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/redasunitenege.pdfIn PDF document text
    • http://chulatutoracademy.com/chulatutor/ckfinder/userfiles/files/baruzetapagizifupimumo.pdfIn PDF document text
    • https://info-jimukyoku.jp/lot/upload/files/libipuwow.pdfIn PDF document text
    • http://cecev.com/stockages/files/76751100533.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/nodosedalazegikabuzo.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/69480069545.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/92015325063.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/86312030335.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16143e760b1eaa---59394367836.pdfIn PDF document text
    • https://www.nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/liwuwiz.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/lelomipufuz.pdfIn PDF document text
    • https://renhedc.com/uploads/files/202110020224212897.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/161595fc27d5bb---mobotogepoloxojifivuxoviw.pdfIn PDF document text
    • https://ichapps.com/ichapps/ckeditor-ckfinder-integration/uploads/files/fasufove.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=download+fall+guys+for+android+freePDF 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_off0000b240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB240 15092 bytes
SHA-256: ac9c78a245c32d7bc8a6c489bfe6df1747f0c761a956dbd2d665f84b768cd451
font_01_sfnt_off0000d806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD806 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01D 10732 bytes
SHA-256: ab605427835a1c040271c5b153e428c8cf8ef91b6defe8792a585236faed115b