Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db178629d07b4cd…

MALICIOUS

PDF

68.7 KB Created: 2021-09-17 09:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a2baa0637768dc3f352a1a38d313e32e SHA-1: 13c01d3a0d1b4f3f9b53122613173b07941e96c7 SHA-256: 0db178629d07b4cd2675037b0edcec368db8f68a617776a368c4fd05924802bc
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of JavaScript suggests an attempt to execute code, likely to download further payloads or redirect the user to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://sineadstone.com/userfiles/file/39755943260.pdf In PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/96691849951.pdfIn PDF document text
    • https://bike-accessories.supersites.gr/content/ckfinder/files/gefelekovodapi.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/14015292376.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/82841579562.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/82021976086.pdfIn PDF document text
    • http://terminsk.by/pics/files/davamugoxejeluporevuwem.pdfIn PDF document text
    • http://lgassociates.in/uploads/33638674941.pdfIn PDF document text
    • http://shyjjc.com/v15/Upload/file/20219171336182899.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/texafinisoboludog.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/44775692855.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/67907727599.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/82548952281.pdfIn PDF document text
    • https://chsins.tw/uploads/files/202109141825116715.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/3539832605.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/mixewajaduz.pdfIn PDF document text
    • http://armiikrajowej36.pl/public/upload/ckfinder/userfiles/files/tudikejode.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161433f163b257---pegenexenepakawowinero.pdfIn PDF document text
    • http://twgo8.com/uploads/base/files/202109160721056292.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/57451526939.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/q1mpncgca5idalvsbbomk9mr02/gatefovutid.pdfIn PDF document text
    • https://www.gpaci.org.br/cms/ckfinder/userfiles/files/27903273524.pdfIn PDF document text
    • http://bacsiha.com/public/ckfinder/userfiles/files/patimejowobudububas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=go+movies+malayalam+app+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_off0000b08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB08C 10660 bytes
SHA-256: f9124a0ed6303014ad2d0df86c1000ecb72f189760fbe7e3728fb71368771771
font_01_sfnt_off0000c904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC904 14408 bytes
SHA-256: 2ee6354b79a1be791bd2a9c2e83b1e3059110189944445387fbdf8d9af5696be
font_02_sfnt_off0000ece7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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