Malicious PDF — malware analysis report

Static analysis result for SHA-256 820a6b39ead3a889…

MALICIOUS

PDF

91.1 KB Created: 2021-07-30 08:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0b2d64fc19e95e10133b44715a4f4d5f SHA-1: cb3fd5363df3c82add8b2c8b82a3c54fafdf0c79 SHA-256: 820a6b39ead3a889c95000d0d755485ae0718b768ad5d2d5b4d398423cc826ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings point towards an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • 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://drafthe.ru/uplcv?utm_term=avast+cleanup+premium+2020+license+key+2043 PDF link annotation
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16094a1b73c7b4---5812266704.pdfIn PDF document text
    • http://flyingcarpetclementines.com/userfiles/files/78242914262.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/a665e14903008da863e520b4884d3cd1/12473722284.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/xatuded.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/madefetufodidibu.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9db4d69cf2---pasapofibarinaxedodide.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/kiwibupabizazamoge.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/jirudaxiropizukev.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/605e1e7111ebb2d817187a8cbbdc1404/bopomuviwoxuna.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/88032572510.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b002b8c23ae---38273201714.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b80e89848---bixiwuxulilipakipit.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e575d071aa---nefitawujibi.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/62581440642.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/pulekedorafalodi.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/f4d91b16571838ab746c5441b6fbfcf3/59969640543.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4d3e7f522---wuzarakinobevifuw.pdfIn PDF document text
    • http://bjjiffy.com/upload/xatenaluvizesubas.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/51264658083.pdfIn PDF document text
    • http://thamcohoaian.com/webroot/img/files/79696533034.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/207b914992c7929a938bb233b41965ee/rapazuzopavozarizeripim.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/92023084951.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607048eb9d315---71225350666.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_off0000fe38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE38 11260 bytes
SHA-256: adb0a0584ff5edc7e295d5c4f58a4faa98baf17e004f5c8df718ca6563c3d7f4
font_01_sfnt_off000118ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CE 17004 bytes
SHA-256: 4396eb2cf332eda5207e7e669633c37fc25d76e28caa7288e50b2923f11ae100
font_02_sfnt_off0001451e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1451E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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