Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec05e04f2c6cecd…

MALICIOUS

PDF

84.5 KB Created: 2021-09-17 19:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 76aafdcee1e80a18d85171528fd561dc SHA-1: 898bd0101f845d0a4cc6fddae5292397b9055640 SHA-256: 0ec05e04f2c6cecdeb9d974d34f0c2aec6fd7e63876008d6eddbaa17bffdd356
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, including one pointing to a raw IP address, and is described as a link farm on disposable hosting. This suggests the document's primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://medvor.ru/uplcv?utm_term=brightest+star+in+the+sky+ep+1+eng+sub PDF link annotation
    • http://thayloilocnuoctaihanoi.net/upload/files/47198963010.pdfIn PDF document text
    • https://wroclaw-effatha.pl/grafiki/file/50797508100.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/161319b650b697---93638001684.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-9-13/20210913072452265618.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/95218923510.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/14910123885.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/fazimotepetefaz.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/totefodefusupuvalufojural.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-11/20210911082355622742.pdfIn PDF document text
    • http://mimarathi.live/assets/ckfinder/core/connector/php/uploads/files/batir.pdfIn PDF document text
    • https://mimpiindah168.com/contents/files/98021714828.pdfIn PDF document text
    • https://faceless.me/userfiles/files/ronuwe.pdfIn PDF document text
    • http://autodilygood.cz/files/file/welil.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/39412e4f6b4231ee2b8ee4425b6a4cbf/86027381322.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/xanekoxakemiw.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/mutil.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210906_73E1C65E0B4011FA.pdfIn PDF document text
    • http://sb-78.ru/files/file/dubap.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/gapawogivowuvoviweteniref.pdfPDF link annotation
    • http://gurgaontaxi.com/pa/trainstation/uploads/image/file/49614002860.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/bejusovugi.pdfIn PDF document text
    • https://estatecambodia.com/htdocs/cljr/data/files/zofok.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/kidefusuxaged.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/nekifus.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e58e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58E 1868 bytes
SHA-256: 9d2bb2d94384256bb38bab4c3005c13f44a8b25eb5b232dcefe64ad24aae4b51
font_02_sfnt_off0000ee41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE41 23568 bytes
SHA-256: 38dcaa3e4b320e4d797a7dfd1cfb871470de0c4755a9e11fad5e166e2352c6c9
font_03_sfnt_off00012ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADE 10916 bytes
SHA-256: eb17243aef059df9d46d7e822a543ece5bb1102ee0d01f6c5d044181b7edb3cf