Malicious PDF — malware analysis report

Static analysis result for SHA-256 60dbd5a7e646a2ed…

MALICIOUS

PDF

83.4 KB Created: 2021-10-09 04:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8393b98a9c8f8963f677e6797e6bc52b SHA-1: e13fadc74524f7c826086cc56eeba92d179ab438 SHA-256: 60dbd5a7e646a2ed62e5110e36752899453a51d2db4980be37aa732d64d155ba
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://ledseoul.com/userData/board/file/32346689369.pdf In PDF document text
    • http://insk.ru/img/userfiles/file/60464060870.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1614ee169de479---mulesazumujotonerejawo.pdfIn PDF document text
    • https://tanhaithanhvalves.com/quangcao/admin/file/10589687021.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/sunokabo.pdfIn PDF document text
    • http://laskod.hu/userfiles/file/wasagekasevadibaraja.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/81728657050.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7d4f2e1c8---27601580152.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/gasobafamutaxovanapimo.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/49081927107.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/99127672919.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/gevemosamipimuline.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/nowerojobedanulutokaluku.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/26816401918.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/30224867667.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20211009085258.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161529993ec336---tesojidufejonazow.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161449c8119388---92024982596.pdfIn PDF document text
    • https://trainova.com/userfiles/file/nuzokugumovofagese.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/32463236964.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/31182801010.pdfIn PDF document text
    • https://alariel.be/userfiles/file/36769593931.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/jofotixozotulurejepevijit.pdfIn PDF document text
    • http://kolbiko.com/images/uploads/file/9502523894.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=george+benson+come+into+my+worldPDF link annotation
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/beganotunitipuge.pdfIn PDF document text
    • 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_off0000d7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E0 10932 bytes
SHA-256: 3679fcc7d7b3cf7bcebd1c41398d8f1a0bb70149eaebac8ddbe76c64bd718f1a
font_01_sfnt_off0000f110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF110 20560 bytes
SHA-256: 8e130dbec45357661e7c626631b996c28f4e95b811cbe30f8abca6b1d45ce2b4
font_02_sfnt_off00012633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12633 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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