Malicious PDF — malware analysis report

Static analysis result for SHA-256 534c11faa8c20a99…

MALICIOUS

PDF

66.6 KB Created: 2020-12-02 04:52:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: af63ee04f69d2dbbf1fded4389574136 SHA-1: d656c0d559403d455913c48a005cb83e9a637666 SHA-256: 534c11faa8c20a997bf5a5def4753c9453162466e7ec4e27a319c0ad3d6a3346
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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/strik?utm_term=grow+nano+v3 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369794/normal_5f8934a708fbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390056/normal_5f988101ed6ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416299/normal_5f9e9176d277f.pdfIn PDF document text
    • http://www.opentle.orgIn 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/812da88f-3e95-4df1-9e33-be4e1ee890c9/university_of_michigan_computer_science_requirements.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf5601491241adc44ee7e/1606219104981/78502300281.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc294d0bda9c57a97c8e281/t/5fc3c0f36457125654ae6dc1/1606664435935/writing_proficiency_exam_sample_essay.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5bc03485235c86bdc245/1606376385258/avengers_infinity_war_google_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b14f9d59-f3d1-491e-a4d1-effc6ef368f6/a_critical_and_cultural_theory_reader.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0de261e25426e1005f6d/1606290914379/zovawetevarewir.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/206-209-2867__-2870.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13405bdb33045eec44b84/t/5fc55d37f8cdb769c696a3cb/1606769975838/gnc_smoothie_menu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1c8d1d5d775a7853b76c/1606229135563/wefajopakejutotipabazu.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000bc41.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBC41 11512 bytes
SHA-256: 5af5c0d015870384bcc4053d2baf391dfe18d9fc02df0c6576cd3bbc6c88e47d
font_00_sfnt_off0000abb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABB8 4816 bytes
SHA-256: 1241b23c447dfc57cdde95c85cd5215b53ec37741fdd531dbca0fbf7b55a1e43
font_02_sfnt_off0000dd01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD01 9568 bytes
SHA-256: c217e932795555c73f3c4aa4140d2ae8f7331e5b413d2046204d13d390c43fab