Malicious PDF — malware analysis report

Static analysis result for SHA-256 6772a8d39b7041ee…

MALICIOUS

PDF

81.2 KB Created: 2021-03-20 12:31:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24719a36d9ca49f17c84a9ad89135596 SHA-1: e2a87cd5f36802d29e69ddb2304e665391211145 SHA-256: 6772a8d39b7041ee2b9f843216ac847b546b9e9038b28b10f51961120e6188db
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs, with a primary example being https://mezovuduw.ru/wix?keyword=demon+hunter+level+guide+season+21. The presence of a large number of external links suggests an attempt to manipulate search engine results or redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/wix?keyword=demon+hunter+level+guide+season+21
    • https://kesakoti.weebly.com/uploads/1/3/1/0/131070149/8820875.pdf
    • https://cdn-cms.f-static.net/uploads/4385876/normal_603c1e66b6aee.pdf
    • https://static.s123-cdn-static.com/uploads/4490974/normal_5fe5dd882e90c.pdf
    • https://tujuwofaxeg.weebly.com/uploads/1/3/2/8/132814826/8e80530f28ff0d8.pdf
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/mazeka.pdf
    • https://wikuxokogex.weebly.com/uploads/1/3/1/8/131872144/580cd2.pdf
    • https://cdn.sqhk.co/penuvipaw/jZVigJa/23630113139.pdf
    • https://static.s123-cdn-static.com/uploads/4402737/normal_600181999c154.pdf
    • https://cdn-cms.f-static.net/uploads/4450418/normal_6027f14418978.pdf
    • https://cdn-cms.f-static.net/uploads/4381536/normal_5fda91feb41c8.pdf
    • https://cdn.sqhk.co/jesotipo/5rShgDc/line_official_account_thailand_pc.pdf
    • https://static.s123-cdn-static.com/uploads/4377928/normal_5ffc22b94f1cd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7897a494-e2fa-47e0-83a9-9d9899b7579d/xusuziliwi.pdf
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_8f0ff54af83844a1bade328cc5641855.pdf?index=true
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_299af0f3c2b24069ad681a55f8d35a38.pdf?index=true
    • https://uploads.strikinglycdn.com/files/433ed1da-80d7-4baf-9fc3-7a7966905c1d/tedebitigarazi.pdf
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_3ad594e3bb344438872b3eb368dc7475.pdf?index=true
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_42fe492c3e1e432d97792d4ce0d36920.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b6f88cf6-c55a-4599-8bd4-043816584eb3/kizelaxigakijabobo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcf9.bin
4e42ff471ce6dc9a397b65497fad684c3c69c4b03ac14357b5cef7520832016f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF9 5480 bytes
font_01_sfnt_off00010f84.bin
bed605a5505f93f49f175d70b2743b07d8c3b9b58bac0d36cbd3fba5d6efe795		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F84 11320 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.