Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9208354571668c…

MALICIOUS

PDF

84.4 KB Created: 2021-02-24 01:45:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f2fb0f4502560de70ee18a5a7dba9e33 SHA-1: 751c9eea2c379832488b6dad5b26e73067a911a2 SHA-256: ee9208354571668cef1b6b0baf067601406b9e4c6a97778ce885986cfd01b1ce
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

This PDF file is flagged as malicious by multiple heuristics, including a critical alert for a redirector link to known malicious infrastructure. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document attempts to trick the user into installing a browser extension or update. The embedded URL `https://crophysi.ru/strik?utm_term=fender+mustang+floor+effects+processor` is identified as a malicious redirector, suggesting the document's primary purpose is to lead the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://crophysi.ru/strik?utm_term=fender+mustang+floor+effects+processor In PDF document text
    • https://static.s123-cdn-static.com/uploads/4487201/normal_5ffd0d449ba18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473035/normal_5fd333af1cb23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380072/normal_5ffaa48c34d1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498345/normal_5fe3487283d0c.pdfIn PDF document text
    • http://bestplacefor.rest/grade_1_math_worksheetsda6kh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445731/normal_6006170cbb681.pdfIn PDF document text
    • http://magnifioco.site/buzesinadudezovipedumabi1qb.pdfIn PDF document text
    • https://cdn.sqhk.co/pexejaxer/Xgg6nQj/19157944926.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/hggjigc/42432479086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472198/normal_602a30db0acc7.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/jhhhdC3/31844339373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_600d8204bb1d3.pdfIn PDF document text
    • http://7lessons.space/tileliwidimazewegesojksft.pdfIn PDF document text
    • http://rte-ita.fun/wawemuwobas20sxp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527237/normal_601a54930f58e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF07 5264 bytes
SHA-256: 7ca28faba3cb895153a6f37ca014c2c96c60c3462a46a945903e5085c5a27f18
font_01_sfnt_off000110cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CF 11140 bytes
SHA-256: cfb6ea892c7f032badc9217ef3e3936bddd9eeb40a7ea87d2ee13d2033976cf7
font_02_sfnt_off00013622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13622 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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