Malicious PDF — malware analysis report

Static analysis result for SHA-256 e865daa714021b2b…

MALICIOUS

PDF

71.7 KB Created: 2021-09-25 16:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a1f02fa2ad44e88d318a6ec64298d06b SHA-1: 41d5bf4d7164a8ad48c3240508f7e596f457f142 SHA-256: e865daa714021b2b10fa1f7e8f0e8c04933b799de2b615446a7eb3f088259751
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript, which is often used to execute malicious actions within a PDF. Additionally, it features a large number of external URIs, many of which point to potentially suspicious domains, indicating a likely attempt to redirect the user to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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://paramourpourbebe.bettygagne.ca/userfiles/file/83794697324.pdf In PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/lijojigixilajap.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/budijovagig.pdfIn PDF document text
    • https://masukpt1.com/contents/files/30807407373.pdfIn PDF document text
    • http://ocean-ex.com/images/blog/file/59194018930.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/kunaxejapaberigob.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/fetotupila.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3716ec21f---mexoxidovewotiguwitavaput.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/vinipisifegowisapeluxefu.pdfIn PDF document text
    • http://temple.mo/userfiles/file/rifevuvojivabugedulajid.pdfIn PDF document text
    • http://hueide.com/upload/files/88423021374.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/6227176539.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/29028797930.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/1302143884.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/13967973535.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/momuvexosamupamelip.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/17762350421.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/1a432ce96fa309ec0a08817223cc3911/xatijufuzip.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/silarumisobo.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/21145887054.pdfIn PDF document text
    • https://aynadakikemalizm.com/resimler/files/42106958974.pdfIn PDF document text
    • http://contua.org/userfiles/file/fifezanitukuzafagukob.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/tifuziwu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+check+screen+touch+in+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_off0000b256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB256 10688 bytes
SHA-256: 715e25cf24bcc682f6a3d11e390e8e24920a9a23a8dc08107d96773ef15b1cb7
font_01_sfnt_off0000cad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EA 18140 bytes
SHA-256: e00fae21f5340ab0fd003ecc9479aae1bf7dca9a56ce4b14a2ac55b7ab78c622