Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eaa1528a66d776b…

MALICIOUS

PDF

67.1 KB Created: 2021-02-14 16:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 181013883203c5015cb70510f9bb2088 SHA-1: 33ab0c57aaa2dd6d197c909465ce001276613d46 SHA-256: 7eaa1528a66d776bd8d4936787fa18f3289c388fc810cab5db7782cc7573bb2d
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to educational worksheets. The embedded URL points to a domain associated with malicious activity, likely serving as a landing page for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wb?keyword=independent%20and%20dependent%20events%20worksheet%20answer%20key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464072/normal_600b975a81375.pdfIn PDF document text
    • https://cdn.sqhk.co/wefadegese/jbjfjeB/yellow_soul_undertale_game.pdfIn PDF document text
    • https://cdn.sqhk.co/wibepudib/ih31lgI/pocket_claw_knife.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_5fda6bc7efb62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373297/normal_5fe44fa3749d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495385/normal_5fc88c51378c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472766/normal_6003d2b0f2a45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470980/normal_6004f7e1af553.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420441/normal_5ff9f8e93801b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366676/normal_6005052cc738c.pdfIn PDF document text
    • https://cdn.sqhk.co/setinapas/b0OcUgf/6527288125.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lelefabopotudox.rf.gd/technical_specification_of_5_mva_transformer.pdfIn PDF document text
    • http://jarujoburisuw.rf.gd/captain_america_4_movie.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_off0000caea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEA 5272 bytes
SHA-256: c6e2176ca6e7e090406e3e90b05e320fa3290170ff0ae5c97a2e43f6f0d423f3
font_01_sfnt_off0000dced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCED 10176 bytes
SHA-256: 0e97e891f6825f4b298e338156ef9863cec5ef691ebccb4908a7d0080cbf13ec

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