Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed47b0ad66b8f2b…

MALICIOUS

PDF

78.5 KB Created: 2021-09-18 12:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1fa5f826458156471be5e698e17323f3 SHA-1: 3f63add0731236cbf8ff61557b23b537afc65b55 SHA-256: 6ed47b0ad66b8f2bc3c4c45b19548a2e9c0e136d92275dec7e075fe6725fe4cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs that point to various websites. Several of these URLs are hosted on compromised CMS platforms, indicating a potential phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://queure.ru/uplcv?utm_term=demon+slayer+movie+release+online PDF link annotation
    • http://virus-safe-zone.com/ckupload/files/sutudi.pdfIn PDF document text
    • http://kisito.com/userfiles/file/rilaka.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/a79317c5441de6e0601f5e677c152aff/mafutifomudezet.pdfIn PDF document text
    • https://kubermatkaplay.com/ckfinder/userfiles/files/bijuzekafedoduxo.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/94672890983.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/74698572951.pdfIn PDF document text
    • https://cuatudongnhatrang.com/uploads/files/11877013211.pdfIn PDF document text
    • https://basisnomor.com/contents/files/31214974308.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613669d6d805f---42490939698.pdfIn PDF document text
    • http://grafosaleservice.cz/images/fck_editor/file/35905392211.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/26470374296.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/lejideduvi.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133fc99251cd---34485489734.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/22778482053.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/matujejazoxunite.pdfIn PDF document text
    • http://tradotel-riviera.com/file/23377736262.pdfIn PDF document text
    • http://0975811252cool.linker.tw/files/popimibadinirimisalesug.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/1039128711.pdfIn PDF document text
    • https://knurussian.kr/DATA/upload/files/202109032350247760.pdfIn PDF document text
    • http://wakesup.org/userfiles/file/rovovanozopimotudako.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20210908_221617_165.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/vanezesejeko.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16132f532c2b36---karowovorewamagupafapix.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/33285321092.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_off0000ce22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE22 18100 bytes
SHA-256: 423fedc79278b696f6fd3fe0f751423ff11466326454cd51cbb73e11ad2b1067
font_01_sfnt_off0000fcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C7 10352 bytes
SHA-256: 8f20ad041ffd3e4f413b997798aa7c60b6a53cd4f003a7908bd844510edadf3b

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