Malicious PDF — malware analysis report

Static analysis result for SHA-256 eefeb458a619eb70…

MALICIOUS

PDF

69.1 KB Created: 2020-11-28 00:02:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c24d7b6fa4397fc68dd1f22a8b53a045 SHA-1: bb44e633260b51d4caf9427d6a0df4456d3ee148 SHA-256: eefeb458a619eb70127a7f4ed82483ac2442f1f04a6aa0c70a2a68d08474bf5e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffking.ru/strik?utm_term=indirect+object+pronouns+spanish+worksheet+pdf+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367019/normal_5f8bb366a1b22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380694/normal_5f8d4b54601d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383136/normal_5f8d63f22643a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402710/normal_5fa399346a445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443337/normal_5fb57b4ae6038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477892/normal_5fb2e5f41dff8.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
    • https://uploads.strikinglycdn.com/files/d177871d-9824-4848-8fb1-236c914878d6/kubofokutute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acd4c2e7-2d20-4fc6-883e-a1c219301ace/27066335648.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/45458915651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c11cf3e-d24c-4179-b96f-a686da9408d4/sample_letter_landlord_not_renewing_lease.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b266674-cbe6-454d-84cd-58920b7d5f12/how_to_write_a_ceremony.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a5a36fd-5616-4fc7-8416-778311781b6e/good_doctor_korean_drama_episode_18.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/los_bandoleros_tamil_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c9a29f1-88af-47bd-b337-5a78ffdc2b33/visozatubitiba.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC140 5400 bytes
SHA-256: 43349c0a950be3c20115903ba1e42020a48a85f66fc20b875c85adb809ff423d
font_01_sfnt_off0000d397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD397 11564 bytes
SHA-256: 65b1bfab58b6752737ef7ddbc471f993b220e2cd5cb45a70c6c02842e8ddf3cc
font_02_sfnt_off0000f94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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