Malicious PDF — malware analysis report

Static analysis result for SHA-256 0befcc4ec7f8da88…

MALICIOUS

PDF

84.1 KB Created: 2021-09-08 22:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ccd1820cc1843cf083d4d12d3f96d060 SHA-1: c7729004cf290b347744ac1c9b0c5a92ee9a8be9 SHA-256: 0befcc4ec7f8da887bf97915dfa92df02d4f20f3fb5b57bed4415735b25d3b26
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to potentially malicious or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 http://liveisagenix.com/ckfinder/userfiles/files/72527885636.pdf In PDF document text
    • https://lmbri.com/WYSIWYGImage/file/96155875647.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/seluluzib.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/xipawegejali.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/27369752275.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/jigikovapagotope.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/xubila.pdfIn PDF document text
    • http://cesarrodarte.com/userfiles/file/gusarebalujopisipisi.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/73119661834.pdfIn PDF document text
    • http://rutka.pl/media/upload/files/e60e6d050506a395b3bf58701f520694.pdfIn PDF document text
    • http://sarigol.kr/userData/ebizro_board/file/50101344296.pdfIn PDF document text
    • http://neodermclinic.com/file_media/file_image/file/sosaju.pdfIn PDF document text
    • http://k-ookuma.com/js/upload/files/rowafutag.pdfIn PDF document text
    • https://hkpefa.org/editor_upload/file/pumodiwujariseza.pdfIn PDF document text
    • https://karaari.leaddeehub.com/userfiles/files/62043227351.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/silupuzeni.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d7f87645d---22065169696.pdfIn PDF document text
    • http://sql110.com/pic/zesogikoputonat.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/69931886300.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/16908899950.pdfIn PDF document text
    • https://innotek.vn/uploads/news_file/xadinera.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/94637640542.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/78209538901.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=car+customization+games+androidPDF 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_off0000e2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E1 10856 bytes
SHA-256: 25f0c7052a7ae0ef23c9eebe74c5d142cf0e1d31e74dc09d87221c4be21274e9
font_01_sfnt_off0000fbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDA 17836 bytes
SHA-256: c1dca35bdf71bbc5b584e4500ffaa21e2918bf5c70276747154fde8cf66f7c63
font_02_sfnt_off00012a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1