Malicious PDF — malware analysis report

Static analysis result for SHA-256 bffd517a6965cb4d…

MALICIOUS

PDF

70.3 KB Created: 2021-09-29 14:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f8b47ada363b95deca92bd07bf63d07c SHA-1: dec2f0acb18d08cb65a0cd1efdfb721473f9283a SHA-256: bffd517a6965cb4dc1c07a9cd65181edf2e2c9bf55d6a5d9d58d942ffc67e7c5
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 and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://crewmak.ru/uplcv?utm_term=minecraft+pc+pocket+edition+free+download PDF link annotation
    • http://microcement.ua/userfiles/file/wejediti.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/kekuvurazusulubakumudivos.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/2021928154821800.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ai9jlmi73akoau9i34qrps1rlg/3034781368.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/87624599628.pdfIn PDF document text
    • https://drlanda.hu/user/file/91679011639.pdfIn PDF document text
    • http://lawyergz.net/uploadfile/files/86622636990.pdfIn PDF document text
    • http://hotel-gerard-dalsace.com/upload/document/80151759286.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/wanev.pdfIn PDF document text
    • http://xtra360.net/campannas/file/baxesijezipewokogepod.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/10973341099.pdfIn PDF document text
    • https://tebra.si/userfiles/file/ranexekavirosupimeniri.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/gebokasof.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/redebus.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/vitawanojuteguxudebazep.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e78540c48---33216978973.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/54745949134.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/sufibaxigepujijuvaxa.pdfIn PDF document text
    • http://momsystem.ru/public/file/doxoxanagegipuf.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/19177289827.pdfIn PDF document text
    • http://autosvanbeek.nl/mindcms/js/ckf/userfiles/files/nobujuvadezoxawakiges.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/13627965486.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109190758446239.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/26913004871.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_off0000afdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDB 16880 bytes
SHA-256: c8432b345b2f4b176a25fd3cb143d984849b29d156c6db1ab1dc04ac5a621ea9
font_01_sfnt_off0000db09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB09 10616 bytes
SHA-256: dd92a860161eca2653031b9447ff208bfc595f0a8955c9b8e8c04e9ab541fe03
font_02_sfnt_off0000f378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF378 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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