Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3196f618931da34…

MALICIOUS

PDF

82.1 KB Created: 2021-09-16 18:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 83b4bdc61ecdb3af824da56886abaa77 SHA-1: 4d861e0262cc6269c0a58fb119f320b19e4c9cd9 SHA-256: e3196f618931da3478d39e138d37056ada6ce77c659881bdcd43426d6db566f2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://owv-sad.de/userfiles/files/fifugunozixivelusemi.pdf In PDF document text
    • http://askort.pl/Upload/file/gaditexo.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/fidike.pdfIn PDF document text
    • https://jasmijnbloemengroen.nl/userfiles/file/46500957211.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/setoxunekegalu.pdfIn PDF document text
    • http://wawa757.com/uploads/files/31372633769.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/zetubemirazurun.pdfIn PDF document text
    • http://peknanevesta.sk/media/file/busijuxam.pdfIn PDF document text
    • https://biroestarsa.hu/uploads/file/fiwapewozutuwuxosim.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/xoginezawawepasufufalux.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1e01d40e9---70143732801.pdfIn PDF document text
    • http://aallergy.friend-match.com/upload/files/98589876464.pdfIn PDF document text
    • https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/76206004768.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/tanibonitefop.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/22043770101.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021090516445573499.pdfIn PDF document text
    • http://jobcred.com/rk/jobcred/uploads/image/file/legog.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/73579358395.pdfIn PDF document text
    • http://simsvizag.com/admin/uploadedfiles/file///46384760465.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/mawavaw.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/69413398847.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/femorolujasubu.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/74598006485.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/92966934617.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=vidmate+2020+hd+free+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_off0000d965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD965 18724 bytes
SHA-256: bddded7f077e6034de29466390002f89e9f24670d6cf8c218ca69a30025f6291
font_01_sfnt_off00010a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001222f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222F 10748 bytes
SHA-256: 026f29105130c984c9bedb1af922d0c8fa0468bda3f85f4ad57f9b647c7db7b7

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