Malicious PDF — malware analysis report

Static analysis result for SHA-256 4762b444d038dd63…

MALICIOUS

PDF

50.6 KB Created: 2021-01-06 15:21:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 47e8ca661e0367e150979b4a9d61bf9d SHA-1: 8bda96501b759c4edf23d648887640a5617eb4a1 SHA-256: 4762b444d038dd63991c229cee74a8107b69498b0dc1c7b82c0c6ebbed544f3c
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with critical heuristics indicating it functions as a redirector to malicious infrastructure and a link farm. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to direct users to potentially harmful external sites, aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7962

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=beginners+guide+to+minecraft+reddit In PDF document text
    • https://mefiremen.weebly.com/uploads/1/3/0/7/130776246/4618898.pdfIn PDF document text
    • https://cdn.sqhk.co/faxixuwako/hcB8jhf/gedubo.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/Bqpjcjg/66592391040.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwalimo/dRpTif5/spinal_cord_definition_and_function.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/aFggKih/12557479599.pdfIn PDF document text
    • https://vakikuxikedeti.weebly.com/uploads/1/3/5/3/135320305/tolomusipam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1d19b88-bf48-46ed-8601-1f47956c1ac4/919009604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37885ea9-9eb5-4fa9-89a6-f730c9bd5d13/minecraft_steve_smash_bros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e94dc4-6824-4782-a955-0b8ac960b3eb/17468440190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/902d181e-e496-4a94-ac6b-f29d3cfa1cd2/takubiluvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bfbc3bc-3ed2-4991-88df-9f0e8e727ab2/garden_shed_plans_10_x_14.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b77f6a9f-a483-4890-ae19-ca0000981b14/cross_disciplinary_define.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4261817-742b-4bc8-ae46-924e2d1a7e98/mesh_texture_roblox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a450ad-d8e0-410b-809f-4789242b6fbe/satellite_city_hall_jobs.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB884 5240 bytes
SHA-256: 9c95983cce4228fc3e3946fb37107fa796257c0009e1f1be942c9b45e43e1c95