Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a6c5249b5da43e…

MALICIOUS

PDF

92.2 KB Created: 2021-07-01 11:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8a1228223615a3950976c4c7215a8935 SHA-1: 656d60073723213e35499f0c634644ee29de18f7 SHA-256: 22a6c5249b5da43e10d5150f2ce8e193dad5aaa325e4ca876c76707823e563f3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links, many pointing to compromised or disposable hosting, indicating a link farm for SEO poisoning or phishing. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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.
  • 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 https://hondamienbac.vn/userfiles/file/81991351761.pdf In PDF document text
    • http://seoulsquare.com/userfiles/file/38613211511.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/xepabatagarinakeresoxa.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/ludezegixugagodasutusizux.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609d55ccc0326---xewud.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/9544445638.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607e27e629015---lujipijavimej.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/68973241705.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/c105ebafb5480cd8bff44afa8e792fbd/jepemavetixanexujimaz.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/27168df7a902b93fc4a98c4d33e2eb0f/2636710924.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c684ebee90---dared.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/8fa0404ec319ace3c24004605ac6a24b/25300335311.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/1b34c3cf89274d3751f5625422362c60/tuvavejateniwuxasifobi.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210601045105.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/17aa06a57ce94293e8d02f9cfb3d6eba/setegifurozowugesejuwifup.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/pnl5tvge7u7ba0sa9d3ptfc0k1/93329532875.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa939dbea2---70165952661.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/da21e75905e71aebdf934cd0077357ed/tudapor.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/gemoro.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/sokn4esigf8g1n472fqfgmb1mp/74689455349.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5968dd24f---78364498400.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/64992789477.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/ebc613b3ed5c6589b96bff1bf3db3f92/gekokufezemadizi.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/5uujr3kup09q3cspm5h5n1st2c/26395573800.pdfIn PDF document text
    • http://beulahcooleycollection.com/clients/870349/File/54904224468.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/c5a95fe647097435c19c57eb0f2fde34/41207762109.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/fovupisibi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=consecration+to+mary+datesPDF 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_off000106fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0E 16860 bytes
SHA-256: 14e7957aa09d12326f3a0fb6cb93e0c2101a1aded73e23b8eebdae1229f0f594
font_02_sfnt_off00014b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B39 10628 bytes
SHA-256: 78c57b189f99162f0c0c626a0b605ba98d86abc068e4684a1f8ac919dea969b3

Open this report in the interactive analyzer, or submit your own file for analysis.