Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec67f199ba5476b…

MALICIOUS

PDF

83.6 KB Created: 2021-09-02 09:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d89dcdf55f8bf7863e577d3e28ab1fca SHA-1: 8048eea0b052d5b401363cabe44d5238501b843e SHA-256: 8ec67f199ba5476b0b93ba2dab5f45cec8dff80460997af9f38105446d8e9f3d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=post+office+practice+test+474 PDF link annotation
    • http://autoshiftbid.com/fckeditor/userfiles/file/wetuzuzusarade.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608107cf8a0bf---79113225572.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-8-6/20210806142850671953.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2c1d6911c---dafokuretuvuvemanuxowodo.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/tozusokatijunotani.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d9f28b157---63155994151.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/9176eb5c4684465d9b86e7d22c3111ea/19519904161.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c92a2404347---tosoribekugaxena.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/dudixexizede.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca99138a2c---63187619988.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/25239231220.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/af478cd5ab5ba9d2af3d7c21be5c07bd/6525015539.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/fubelex.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/46112173041.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b291a4af4a4---vibiteze.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088926699967---zijotagixaz.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b0657947c---juburufokepulugodulozub.pdfIn PDF document text
    • http://shophouse.info/images/files/xobolatefarolikotigebu.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/ropipezu.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/lcbu2eci0he010tidsv9j25as7/lotepirakij.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/6svikkt78nk05hc0930bv5uqni/zibunenonafepimikako.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/4554926628.pdfIn PDF document text
    • https://sibois.eu/userfiles/file/padezemovopudunubag.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/vogogujuxapukuxowalu.pdfIn PDF document text
    • http://whs1979.net/clients/65916/File/nozazuwi.pdfIn PDF document text
    • https://wsbtitan.com/images/file/gakapivale.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_off0000dffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFC 10452 bytes
SHA-256: 3a6fd74ef4369f7a3ecebd838683570eaa84fcf73df507d79157dd7bf0c8767d
font_01_sfnt_off0000f800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF800 19072 bytes
SHA-256: adf2d1e9ccf2403f1fcaa9f71ee4775a0c2b8c2fb230baadbe2ed4b4cda38fa5
font_02_sfnt_off00012830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12830 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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