Malicious PDF — malware analysis report

Static analysis result for SHA-256 68db80b93135b86b…

MALICIOUS

PDF

79.2 KB Created: 2021-10-10 01:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 03d2e6097c3995e87f8306144aaf1cfd SHA-1: 04fc778ba4422fb6ad78d60e486400cba1088a0a SHA-256: 68db80b93135b86bdcda05a15897c6be86ce48830479c5694388dd6b8c290434
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous external URLs, which are part of a link farm designed to host further malicious content or phishing pages.

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 https://synerhu.ru/uplcv?utm_term=how+to+cut+a+45+degree+angle+with+a+wet+saw PDF link annotation
    • http://globomax.eu/userfiles/file/74504711320.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/napofodibuna.pdfIn PDF document text
    • http://riviera.az/userfiles/file/dulid.pdfIn PDF document text
    • http://actinq.nl/upload/file/18901620864.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/fedulafedojenetigolaguw.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/negunusepes.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/niwedekujigetubu.pdfIn PDF document text
    • http://zjgjqmr.com/v15/Upload/file/20219111436261715.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/xepufoxolanova.pdfIn PDF document text
    • http://metallpress.info/files/timajugatawefalise.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/wibop.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/79678160264.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/rutegavizipiw.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/bemugojekiguveluba.pdfIn PDF document text
    • http://hotspot-usa.com/js/upload/files/metibefevi.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/fisepemereto.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/juxad.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/tamodarumerikovu.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/bemutevefejoda.pdfIn PDF document text
    • http://lycee-elm.info/userfiles/file/9988403856.pdfIn PDF document text
    • http://neowork-rh.com/userfiles/file/51469264412.pdfIn PDF document text
    • http://steinemann-ag.ru/nezirel.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/94422082673.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/40027394665.pdfIn PDF document text
    • http://virtuozi.ru/sites/all/sites/virtuozi.ru/files/fuzujikonivef.pdfIn PDF document text
    • 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_off0000d048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD048 11040 bytes
SHA-256: ba66da461030cd295fc06d108a108bcf219b3a5e378a50d682d79110945101a9
font_01_sfnt_off0000e9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C2 17260 bytes
SHA-256: 676417f1b411b203c37b4fc3b81ab2991de5715c89bec560ed75438bc4cdd933
font_02_sfnt_off00011658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11658 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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