Malicious PDF — malware analysis report

Static analysis result for SHA-256 e719e7c8a3029a0b…

MALICIOUS

PDF

68.3 KB Created: 2021-09-25 23:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: caa7d32c8180709e3a8d33d7f2d4e99d SHA-1: 9b60ddd4044792c8570656a5ee44c8d373f8f151 SHA-256: e719e7c8a3029a0b5d5779326ae3d594e1bbdc174d68b6c3354d45fdedc622a0
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 disposable hosting and form a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a network of sites for malicious purposes, possibly phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://hy-sf.com/admin/upimg/file///tibivamararixuvidiket.pdf In PDF document text
    • http://borneneskontor-landsforening.dk/userfiles/file/jiwosubetokewer.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/pupevadasadapobawafobuno.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161387d526a2d4---92196700427.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/5791331290.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/pamawafuwiwuzajodafusutex.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613edd294f45f---sijifisivinagolupisobuzin.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/balobanemanejas.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/padebipijikevetijoxumev.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/10936846657.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/taradeluxetaromozekibu.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/36693394072.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/vaxejaja.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/gubulixokamesotax.pdfIn PDF document text
    • https://korankertas.com/contents/files/tedegun.pdfIn PDF document text
    • http://huemin.com/fckeditor/userfiles/file/malefuxibazoka.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/16919895922.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/32226378988.pdfIn PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/10489140296.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/rusapo.pdfIn PDF document text
    • http://pegastelco.com/pictures/files/73283518350.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/nakazamojedupadegoroneki.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/gilozijudon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=joel+jamieson+pdfPDF 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_off0000aea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA2 10580 bytes
SHA-256: 49ce0fed038944d4ad51539873fda364aa4d43bb1f0d3eaaf27c09ed9ceae826
font_01_sfnt_off0000c6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000deca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECA 14956 bytes
SHA-256: 0d70b82aa61b9a1a5000e391e2a63eed625c355201dae6c1b96d0cafd87aa2ea

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