Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7f6b0c6d2e4d41…

MALICIOUS

PDF

81.8 KB Created: 2021-09-03 02:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 21d995fe02f49bb30bbfffcdb1cb56b5 SHA-1: 273e9a6f3c5436d92e72e4ed71af65d66accb699 SHA-256: db7f6b0c6d2e4d4195f227da815689668f8a8243293669efbaf0bf7e105b7d69
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and URL patterns are consistent with a link farm designed to lead users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.oneworldkarate.com/fckeditorimages/userfiles/file/fivid.pdf In PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/16657842991.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844bbb7a1a7---13417188626.pdfIn PDF document text
    • http://brlairport.com/images/file/waxuwa.pdfIn PDF document text
    • http://xsteelstock.com/d/files/94614324977.pdfIn PDF document text
    • http://alexandercdg.com/clients/36029/File/bubajubijubetebege.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/02268883038a247410db66de018f3830/85407414710.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/93500286394.pdfIn PDF document text
    • https://medtek.vn/storage/file/migurananevevudaxeduj.pdfIn PDF document text
    • http://klccpa.com/userfiles/file/38573796412.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a72bda4bb---letugug.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/7924169175.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609710c94f3c7---19716761143.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/nelifenetoz.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac6d24f577---jivanexur.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/452hk2qh8hcl6vt33ec9cqakm7/zugafoxofot.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/8952105207.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///vivutuzixinekalupebut.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210508170813_1136038656.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/bcaa4adbdbbcf46d628e5231f136df30/wurifiluber.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/429671654.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/d9ab09edd5eccf7cf099c63e6795c08f/firoxat.pdfIn PDF document text
    • http://xsjsbzrw.com/uploads/files/mumirafuvagujobipex.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/nosepoke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=ricette+vegane+bimby+pdfPDF 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_off0000db99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB99 10892 bytes
SHA-256: 5d2845071196eb7a477e70d4bba94729dc68e931f1b868b1b1f944d3829db9e0
font_01_sfnt_off0000f470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF470 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 17292 bytes
SHA-256: 8f7cf5f5ea5a69c3f0cb611c675b4cb09d78992694bc98e6a9cb9ed6fb456d02

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