Malicious PDF — malware analysis report

Static analysis result for SHA-256 215b99dcfdabe576…

MALICIOUS

PDF

60.7 KB Created: 2020-12-18 09:25:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5cc75897887c89a6108c6a0c6557acd0 SHA-1: 7ee17bf292d8d01adb1c409c0f47b2e7e2cbe0a7 SHA-256: 215b99dcfdabe5762401a68623ca2b606dd335ae68130004dc60a2ccae5cec77
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://cctraff.ru/123?utm_term=barbie+styling+head+vintage'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=barbie+styling+head+vintage In PDF document text
    • https://cdn-cms.f-static.net/uploads/4501660/normal_5fbf41d5e3642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392652/normal_5fda3e8fe86db.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/wepeliniru/coupon_for_free_tax_usa_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d2deea4a794d56670281/t/5fcd4f08c00f007ceaf71fd3/1607290632397/best_daily_deals_sites.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c507acac6192ab713ad/1606372433536/79293934184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72ef059c-cd94-49f9-8049-b255df212752/95740771473.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a79ef9866f3fd2f451a6/t/5fd6b4390f11661d4c38ae8f/1607906366592/renai_circulation_alto_sax_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf491e6d49a06bb569742/1606284434018/life_cycle_of_a_bullfrog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e145bf99-8e85-48f5-b2a6-d7228844608d/fipikewibagofexeloni.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf8e972f8b574a0f31064/1606220011604/destiny_2_leviathan_gardens_map.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/wubexugoxofopiwolabol.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/jantzen_audio_waveguide.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_off0000b257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB257 5440 bytes
SHA-256: 0c7729a2763c6a33b082abbf899ee64033b05834201b2e1d493e86ea229b2a88
font_01_sfnt_off0000c4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D2 9784 bytes
SHA-256: c9d812742b090295a06e723f4dea75e634e27e80fae38cdf2495465d7e6e37c2

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