Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf2f447fef76853…

MALICIOUS

PDF

67.6 KB Created: 2020-12-20 06:44:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4f8a238b5ce1c1210da7970d1e05584b SHA-1: 7460b87548b54400be6fa01359bb94b6704fe668 SHA-256: cdf2f447fef768530ed319ed0803a060bd6753f25391a8bb053a6ebad0a4e008
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely a phishing lure for a "free PC game". The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafffi.ru/strik?utm_term=juego+a+pensar+para+pc+jugar+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465555/normal_5fa89bfbb44fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417536/normal_5f9c731bd658e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdd391cd610986319751208/t/5fdda840e64f57031517d39f/1608362049193/livapawoxitozi.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/wilajagajape.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/electrician_job_interview_questions_and_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3099a92c50b1a1e857bd1/t/5fc3dd3deaf37e3b6412c98f/1606671679965/worksheet_er_and_ir_verbs_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50f32ea4a794d565fe5d6/t/5fd1f3fbae71ea6dd3232ea9/1607595004110/24985479157.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13d0827a199023ab79d37/t/5fc4b05408845d09241e6f91/1606725717552/navuwusolifeku.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc00570a3bf4b14aba44e61/t/5fc66cc1145a8629dc8e2927/1606839493522/game_kart_stars_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/free_loan_agreement_template_india.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfa3873299f0c5439c7a5/1606220347975/ffxiv_ui_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd5508eb685147a09c9c9e/t/5fde5017f5f642265643ed52/1608405015919/homographs_worksheet_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc563a5a3bf4b14abc71da8/t/5fc719e70623334b0c58e43c/1606883817419/battleground_survivor_battle_royale_apkmonk.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_off0000ca6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6B 5132 bytes
SHA-256: be23aff397bfdbcaa1f03484d2e528c3df110329baf67e4f78792e7c9aa08145
font_01_sfnt_off0000dbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFE 11116 bytes
SHA-256: dddbbbe81adce5a2d41e04b8b563b130c9b2af5f0561e7657ef2bb8ba1b23528

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