Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2be76705801db32…

MALICIOUS

PDF

80.0 KB Created: 2021-09-13 15:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6acf0f6cb496e356857aeb86a0663ca7 SHA-1: 4e9fb3b5405692f2bf85cd93d39e1503153425bf SHA-256: e2be76705801db32667bb1a1414907d548a1e87605a434cbbd7de8e032968b90
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for initiating the redirection or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://pajurioverslas.lt/ckfinder/userfiles/files/4854897643.pdf In PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/tapupovokidas.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/4df6som6ssjaedd59u1lv1p0jh/tuzenupawu.pdfIn PDF document text
    • http://simoncaulkin.com/images/baxusip.pdfIn PDF document text
    • http://saaretravel.ee/images/file/dixilav.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/22571115917.pdfIn PDF document text
    • http://conservativista.com/js/ckfinder/userfiles/files/18911831757.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/92098745097.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/55792481661.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/4848568877.pdfIn PDF document text
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/jukowudebiz.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/49954151317.pdfIn PDF document text
    • http://shyjjc.com/v15/Upload/file/2021910103785206.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/8192061150.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/94108778958.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/vuzagitonafixot.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/91664458233.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/motamedejepe.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/72136228157.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a93e8ef90e---firudegel.pdfIn PDF document text
    • http://abpjse.news-read.com/upload/files/9427354092.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/xodofomesifedaded.pdfIn PDF document text
    • http://emachn.com/data/attachment/file/wexexelumozikitemamigax.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/63707876575.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/52990072994.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=game+goku+pspPDF 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_off0000d612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD612 17184 bytes
SHA-256: b140ed04cd6ce24e4235a6fbb3c9307792a3847a8640610cb1e83acd4d6390b9
font_01_sfnt_off000102dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DC 10388 bytes
SHA-256: 77e141b0f561e8d6fe652bd628d9e41f8cdb9348fd1f653e9fc0bfc736292e78
font_02_sfnt_off00011a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1