Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ee6914db66e5ab…

MALICIOUS

PDF

79.9 KB Created: 2021-09-16 16:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: fd272da465cedb1fbccf2546cdd5c2ed SHA-1: 8770603d044c7eeb395df4daa9b33ecfc3c8d5f1 SHA-256: 60ee6914db66e5abef5668d893c7f891bdf259e5c4d24d204f8db5c5f27c856d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates this malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence score suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=raspberry+pi+android+tv+2020 PDF link annotation
    • http://jamalcar.com/userfiles/file/42832234301.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/33474647595.pdfIn PDF document text
    • http://kunbot.com/upload/files/39757285159.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/valesefebosutuve.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/35537312973.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/40159656940.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/1797619503.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210913_E5704FFBE5D21EC4.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614152d8ef4b7---49947274680.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/jurunarobe.pdfIn PDF document text
    • http://vrajacreation.com/uploaded_files/userfiles/files/40369775655.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/25153394130.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/bavigunatuzoxa.pdfIn PDF document text
    • https://crownprolaw.com/userfiles/Proj_Name/files/4766385347.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/kavisokupewoxinedizulupe.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/mogivisufeva.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/tojazedalazunefejekakobi.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/8991771936.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/zigepegituxavafiz.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/sinimorumodapisok.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16131e271890cc---folejomifukotibodatoriz.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_off0000cec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC7 10948 bytes
SHA-256: e32aa06afb3a93c863895f0f528325d6b88195fa44cbec290a6534722371f2d2
font_01_sfnt_off0000e829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE829 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001003b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003B 18896 bytes
SHA-256: 69c05e1922f90e506d9e186834d3d5366f8cf2f1d891cebc66a7c906227ef475