Malicious PDF — malware analysis report

Static analysis result for SHA-256 479387ac0514feb5…

MALICIOUS

PDF

71.3 KB Created: 2020-12-21 11:03:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 04c7e85d4bc22b3dc48061eb2658a48e SHA-1: d320e3e218525ceaee7b67893b0025b4878f1d75 SHA-256: 479387ac0514feb522471f7506235e6317781b4c35ef9c7e163151e924ba814d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=zynga+poker+cheats'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the nature of the redirector and the ClamAV detection suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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
  • 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://gettraff.ru/123?utm_term=zynga+poker+cheats In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f8c7b3e37a96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5fd5f3dbd104c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425737/normal_5fd0df1c3e391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f86f8ea358b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_5fbbf2cd23c28.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/miwolezedubujoz/vipodaseganizofemogox.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37e48cd1e280355e49653/t/5fc5eb75f8cdb769c6b0218d/1606806390263/cle_elum_roslyn_school_district_employment.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfea7fd6109863197839b6/t/5fe00174f23a830a59d2b45a/1608515956671/consolidated_income_statement_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/dark_challenge_christine_feehan_read.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/rixigomozi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0bdc717e7202640e9644a/t/5fc0daf764571256545b7d87/1606474488283/sword_art_online_girls.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f8f692c50b1a1e77efcd/t/5fcee3427cc0b10a0ac26109/1607394115183/gristedes_corporate_office.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfd9daff074777c9861c88/t/5fdfeb0d8afbbc271781fc7a/1608510221596/85356885250.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/hantek_6022be_driver.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6c827d32fb7060d0d779b/t/5fc7fc13f118982ab23153c1/1606941715863/nusolalukewoxuvozinen.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_off0000d86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86F 5284 bytes
SHA-256: ec8c184f08a4b0236f32c72c6f2abc25cb6ec5c6b93ae0d637baec262c3bfda3
font_01_sfnt_off0000ea7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7D 11288 bytes
SHA-256: 6a7ca4642d1d0d483519722ee170a26086c7a19d8a65ce7c6e422c430cab4933

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