Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeaa14ec87465a0b…

MALICIOUS

PDF

80.8 KB Created: 2021-09-23 03:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 71ed5ae04e08aeb2c95e0f1151a312d8 SHA-1: d1fa32214a58608cd1d64dc7587902498b4dc0b9 SHA-256: aeaa14ec87465a0b6f2978c8c7b8ebc5836f1e3c14997bc7c5a9cce9e49f0df4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous external URIs, with one specifically pointing to a URL that appears to be a redirector with a UTM term, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the overall structure point towards a phishing attack vector, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://garglob.ru/uplcv?utm_term=zack+snyder%27s+justice+league+soundtrack+download PDF link annotation
    • http://temdientu.vn/images/ckeditor/files/felesowupikibozunefopevus.pdfIn PDF document text
    • https://apatity.verlauf-ekb.ru/admin/ckfinder/userfiles/files/4219629845.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/94972070319.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/vuweridajogirigigu.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/jifodetubokejomovep.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/jokimaxep.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/32015125554.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/dupurixemisavopudod.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/7dae463d54f70d0d35d65fb609dc8d71/sifikototoxurulaw.pdfIn PDF document text
    • https://kotypsy.pl/ckfinder/userfiles/files/kapoxilikusapefubojune.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/muxikisasemupoporuj.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/11340404311.pdfIn PDF document text
    • http://bolt-go77.com/fckeditor/userfiles/file/wewulotezaxeko.pdfIn PDF document text
    • http://ippon.lv/uploads/File/wigesotajavisoxe.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/95073430369.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/situlisokulixe.pdfIn PDF document text
    • https://banifatemeh.org/data/file/73656310354.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/94295821375.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/fezadokivokakudo.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/38903345047.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/netizexilodafe.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/5329731461.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614638177cc39---48551199453.pdfIn PDF document text
    • http://zoscm.zohukum.com/ckfinder/userfiles/files/29443556405.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_off0000cf8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8F 19640 bytes
SHA-256: 8047ab5268a8195f89cd2e091ce4e02a4c604729bf718bb94f2fa9cb0e895417
font_01_sfnt_off0001033a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B51 11064 bytes
SHA-256: c3e19f999655baee12c6bf4962ce136dc053aeaeda9a0e053517b329ed8e8d4b