Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce94cdd2a5bceecf…

MALICIOUS

PDF

79.6 KB Created: 2021-01-03 04:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ab58d9ffa549dfcc27101394df0edff8 SHA-1: 58cdcecfa0d72f5196eee437cc3e4815f93ff3e5 SHA-256: ce94cdd2a5bceecfe56badfca2d28fef088ea0ff0b86ba516797dda9bd614c71
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF document flagged by multiple heuristics as malicious, including a critical redirector link and an ML classifier. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing software, a common tactic for malware delivery. The embedded URL points to known malicious infrastructure, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://cctraff.ru/aws?utm_term=visual+code+format+js In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406482/normal_5f97563fd2a91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_5f924cc3c4757.pdfIn PDF document text
    • https://cdn.sqhk.co/zumiredosuwi/Dig8JuV/94035192363.pdfIn PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/3251622.pdfIn PDF document text
    • https://bolojowugupi.weebly.com/uploads/1/3/4/8/134886087/8090025.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/jficuia/war_conqueror_4_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/bufutoje/fzQidtv/drift_of_positive_ions.pdfIn PDF document text
    • https://cdn.sqhk.co/ninubisidire/h8xjfmG/75301392967.pdfIn PDF document text
    • https://xuberirerumona.weebly.com/uploads/1/3/4/5/134586272/2921911.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sepawi/xitogalijasatisup.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/chandigarh_di_police_mitro_punjabi_song.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/tg_material_science.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F1 5208 bytes
SHA-256: 4b95a5cbfcd15cfa1506166d00e64d384b352ed662e12d59795dc965c3400e82
font_01_sfnt_off0000f894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF894 10632 bytes
SHA-256: 2beb92e3504ffcc9d82906b259e9aaae0975594708de21c272e6c55ca20d6422
font_02_sfnt_off00011d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D07 16104 bytes
SHA-256: 712590c835452c60cf4005d5ff3b4291b7bdb94b5c22500be4ce3d5353b46ed1

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