Malicious PDF — malware analysis report

Static analysis result for SHA-256 af7635b7b418adf7…

MALICIOUS

PDF

66.5 KB Created: 2020-12-05 06:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c0c0337bc262c4bea1ba0e59ccc9f46c SHA-1: 165ecfac05b0c05627254ecef9bc5837e6a44da9 SHA-256: af7635b7b418adf7ad597db4ccbe9a064f68b85d0b2dc6c18c96daef208bd3ea
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://traffine.ru/strik?utm_term=normie+osborn+renew+your+vows'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment.

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://traffine.ru/strik?utm_term=normie+osborn+renew+your+vows In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383567/normal_5fb7bfa87cd3a.pdfIn 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/c61933ae-7027-48a4-b265-b3ea48343312/jose_celso_barbosa_biografia_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8625fe8a-537b-45c4-8208-0ad754014e5b/93216980775.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/74294575077.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf601218e72e5fdbcf67d1/1606377500238/2743644494.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/46476044714.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b544c89e1c4b8fbd6471/t/5fc515373c6ccf69f3ffe969/1606751543871/16181327988.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/sqlite_database_tutorial_android_studio.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfe1464a3cc4058a4d226/1606221339021/evony_age_1_farming_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/2213278482.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc695a917e720264011615a/t/5fcac54303fa48525432a098/1607124293146/girlfriend_plus_apk_todo_desbloqueado.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_off0000c917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC917 4952 bytes
SHA-256: 898e63df6b70a1990aea185c67dd60174e0c4db796e74eeb38cdb588d6a013ed
font_01_sfnt_off0000d9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FB 10516 bytes
SHA-256: e24fe557be056b3ec789fd4f0c81eb869121f4a8fcc430828669c609b7c2a17d

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