Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b030f072d190cf…

MALICIOUS

PDF

79.4 KB Created: 2021-07-12 16:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d36a3ba71f9f359d3d63c2ebf0bbf339 SHA-1: 2ef55cdf6faf1f979438a8fc5ee053d9e20c9150 SHA-256: c3b030f072d190cf54c5ada85ef94d5554778ced0ed4a5508ccf9fb02be628da
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites, suggesting a phishing or malware distribution attempt. The presence of a 'download button' lure further supports this, indicating the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=color+smoke+background+video+effects
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/kfho8b4bsu72cfmocja3itula3/monuguterizabugomup.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/f442ec84e14529f73a52368a51d0f3d5/20377363795.pdf
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/96651822414.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/3v7tu7vb568fnrt2p33t3k7mm2/dibanimoguwotedo.pdf
    • http://szpital-sulecin.pl/images/fckfiles/file/buxivolezop.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa49de74aa8---10970602310.pdf
    • http://ssaisarang.com/ckfinder/userfiles/files/nobafonevovudezazolurir.pdf
    • http://55thocscompany.com/clients/62662/File/bileraxarenubudob.pdf
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/gavajituwapifaxonixi.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/1be067f3c7ab80573524015d85840a1f/90352746861.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/55743b44b7d3d3e753948fdf0160063a/gofoxulojutopufiril.pdf
    • http://kozelskadm.ru/files/uploads/files/7459950981.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/a6c18f4194fa27c3a8de88acf1db4099/piwezakaketifipe.pdf
    • http://szao-spb.ru/images/news/file/41071934871.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/ece3a97964107c432393d64237355485/zuvowumugewivi.pdf
    • http://zhuoer.ltd/userfiles/file/45361503558.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/f90kv53m049kbnsq9hij9toltq/71315128738.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16071a98c7f374---nonubitobetavilaxibaxe.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/12b82c6fa336a69e5b091b625fc31107/81752878600.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160737847001a6---gavavilopa.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/1i8rdp42fs1ios18vrbnag5ur5/debivusexogowikisagozoj.pdf
    • http://thienanglass.vn/upload/files/xetul.pdf
    • https://binarbaid.com/public_html/userfiles/file/neropesuf.pdf
    • https://gbagencement.fr/uploads/file/59513266501.pdf
    • 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_off0000d382.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD382 16792 bytes
font_01_sfnt_off0000eb99.bin
579cc38850b88f29230eddd04dc9b0ffde07e834e25b07585854142ad5698918
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB99 11248 bytes
font_02_sfnt_off000105d5.bin
d645303941dece6842eda04c878f77fd7358377e556a9749041e65a83311113e
pdf-font-stream PDF embedded font (sfnt) at offset 0x105D5 16324 bytes