Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b296aac852b253f…

MALICIOUS

PDF

71.6 KB Created: 2020-12-31 16:16:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cf9cde90a85297bdf1597944a775822c SHA-1: d0892ebbe2d9e2d2eedbadefc8b05b567b70f445 SHA-256: 0b296aac852b253f9564cbfd4cf686f4f357d7f8dd47abcc20361d53cfaacce1
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier and ClamAV also flagged this file as malicious, indicating a high likelihood of malicious intent. The primary IOC is the malicious redirector URL, which is likely used to funnel victims to a phishing page or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/strik?utm_term=dragon+ball+adventure+game In PDF document text
    • https://static.s123-cdn-static.com/uploads/4388063/normal_5fdfa85b277df.pdfIn PDF document text
    • https://cdn.sqhk.co/gekobegij/ibOibWF/restaurant_story_2_cheats_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392463/normal_5f9db688a4053.pdfIn PDF document text
    • https://cdn.sqhk.co/xonoguduzob/ihpVoii/74714771013.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/vovabagubajegeb/resident_evil_4_apk_obb_download.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/personal_branding_exercise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c5da46a-f12a-449a-b741-c2f55713e548/49117398058.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/campbell_college_school_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b39483-8623-44bc-9b8a-4cca31c17f09/35551329139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5757d979-9222-47a2-8ce3-b98311eb0153/fatopezipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b91c7d93-6e85-46fd-9352-d4b4f91f217c/75731776232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccad55ca-4bca-4aa1-b2d8-db7dc5e227a3/wijulurifuvuzon.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_off0000db06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB06 5168 bytes
SHA-256: 0b3f81dbd9d4d76f49e81698e0b1f559c50d2d76259a9699ba864be295d9304e
font_01_sfnt_off0000ec90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC90 10848 bytes
SHA-256: 2309390f7f765bb894367af3d5e467d9342b1879dcaa561fd3ba212975dff831

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