Malicious PDF — malware analysis report

Static analysis result for SHA-256 0214ecb8c450510d…

MALICIOUS

PDF

91.6 KB Created: 2021-09-14 08:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4a62dfae668ad55e5d49acd7dcfbeccf SHA-1: b162ab985393c440fd8e89b47a218409ac517d33 SHA-256: 0214ecb8c450510dbc7663694964a37ee6e73a7e012570ca6104ecef5dbd8867
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to unknown PDF files. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xabukize.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16132e1eb2d4b9---kedusi.pdf
    • http://coconut.hu/userfiles/file/17612588301.pdf
    • http://werkkledingverkoop.nl/images/docman/files/63213593624.pdf
    • https://tckontrola.hr/files/nabupikanudatolejezifan.pdf
    • https://khachsan295doson.vn/namthuan/images/news/files/95037541846.pdf
    • https://mcsfood.com/images/file/35568819725.pdf
    • https://veaodaibrahma.com/uploads/image/files/20485848854.pdf
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/89414078190.pdf
    • http://ristorantebiscione.com/userfiles/files/dumitira.pdf
    • http://crosswaysrecruitment.com/userfiles/file/gexevevewat.pdf
    • http://agriturismolataggiasca.eu/userfiles/files/1768318672.pdf
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/98298807761.pdf
    • http://kingsauto-bar.com/js/upload/files/65369347574.pdf
    • https://clicksnepal.grnca.org/img/files/files/sapuwesikujejezuvopoji.pdf
    • http://iucecb.com/files/file/zebajukuziwesogifoj.pdf
    • https://raljob.com/userfiles/file/11189461355.pdf
    • https://portalbime.com/UploadedFiles/New/file/zulesisofujinufanakamuvap.pdf
    • http://smartvoicecom.com/userfiles/movodorupadeku.pdf
    • http://homelife-superstars.com/image/files/zamujapezukafojilagiloli.pdf
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/89404835024.pdf
    • https://onutglen.com/caningest/images/file/marasaguvinegejut.pdf
    • http://flagrant-desir.com/userfiles/file/82058100913.pdf
    • http://suspensionestg.mx/userfiles/file/68343397390.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16136f9b962df5---ninerojujokofal.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=live+net+tv+online
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105a7.bin
ec1e02aac4eddc78d0fbc015c9462749efe06a433f8ff63dd8e80a960d9f1b48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105A7 9696 bytes
font_01_sfnt_off00011ada.bin
41df95a7461dd2c493d55084d3aef13883154f472bd13c3ac5dc45d6b90fbcec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADA 17588 bytes
font_02_sfnt_off000148cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148CC 16792 bytes

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