Malicious PDF — malware analysis report

Static analysis result for SHA-256 c924752874b3d834…

MALICIOUS

PDF

74.3 KB Created: 2021-05-23 00:13:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f160b40c7dce9924e64f72289ba6187e SHA-1: a7f5d0d4d548560a6d21a769fd0b49e40fd3d637 SHA-256: c924752874b3d83405747e4de4440b6e7ccf9cbcf6d376925316a2e4db725579
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware delivery attempt. It contains numerous external links, with a primary focus on a URL that appears to be a lure for hacking a game, likely to harvest credentials or lead to further malicious activity. The document's structure and embedded links suggest it is part of a link farm designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://jacksth.ru/strik?utm_term=how+to+hack+star+stable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490122/normal_604270f6ebf97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423430/normal_600aca54918a4.pdfIn PDF document text
    • https://dufadijikog.weebly.com/uploads/1/3/5/3/135325035/nogiwaxu.pdfIn PDF document text
    • https://vuxisiso.weebly.com/uploads/1/3/5/3/135321279/aba308fe42468.pdfIn PDF document text
    • https://wimekigulaz.weebly.com/uploads/1/3/1/1/131163744/567567.pdfIn PDF document text
    • https://ponasamexow.weebly.com/uploads/1/3/1/3/131398296/zofunetoxab_desixu.pdfIn PDF document text
    • https://japapitamamevoj.weebly.com/uploads/1/3/2/7/132740309/jorojefevope_xuxawitafoko.pdfIn PDF document text
    • https://livugazenexaru.weebly.com/uploads/1/3/1/6/131607095/posigerazixukaku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410433/normal_5fe97264d3a51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5fdbecf245c3c.pdfIn PDF document text
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/wezuge-bexuvexa-filuje-koxumosoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_604cd27836897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387567/normal_6061c98489cc5.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/b4d35768-ed10-4503-a361-02f3a4ae9dfa/dalifigemuxevokof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57bf2a31-825d-45a3-8bb7-f0c9d657af20/87047021700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cbf5486-bdf3-48e8-aacc-ca1b04bca359/toro_personal_pace_30_inch_mower_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d32bc6ec-f0ba-4064-a7e9-b80ecc5b3be5/88237578800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d9b4c83-f6cf-440f-ba11-0165f2f5fa66/who_is_the_bravest_person_on_earth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a658f85b-cece-4556-9c12-22dea56b69f1/23074506339.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57D 5144 bytes
SHA-256: 71a6a2c5c09751fcfda1ad7c785b0e69a963f0994cdab435df50e53d2c9254f4
font_01_sfnt_off0000f707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF707 10948 bytes
SHA-256: 51f270fbe4460d7f1615f75501a604a8601df05f208afad29792add5b93e0aed

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