Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c5cd7e2ad928158…

MALICIOUS

PDF

743.4 KB Created: 2020-12-31 02:24:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f4624170968186ca2a70eeba172afd2e SHA-1: 12f2465ba42ce48a521e21caae2a4f4735b02532 SHA-256: 9c5cd7e2ad928158ea1bde1bb9358bf0c6a37d39abf4261a2757308a82da11d7
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3093

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/strik?utm_term=warframe+master+thief+worth+it In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_5f8b9dbf80dfc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427821/normal_5fe0a58fca114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483336/normal_5fdc5417d9cc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386091/normal_5fbededd31d57.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/fhjjgjc/domino_s_pizza_menu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418399/normal_5fc70c6d7a04f.pdfIn PDF document text
    • https://cdn.sqhk.co/tobetusibu/dRDjhhb/merge_survival_zombies.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/gihaUgg/24042402350.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/954de79c-44b1-4d5d-b31e-3ee7efb60625/best_skills_horizon_zero_dawn.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/letter_in_german_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5946fda-11ce-4564-bf75-65e0a568ca1e/xifedam.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/basic_calculator_app_in_android_studio_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e9d1091-65d8-40c2-9422-6a4a93fe4b65/xopowutanimewidazokizi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b149fe43-4ed0-4642-8b26-4135c3a36a94/black_friday_4k_projector_deals_2019.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_off000b4f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F44 5080 bytes
SHA-256: 4b84d866bd247716118894bb432ca051a1e49963673961e6883f84e5517e445d
font_01_sfnt_off000b6082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6082 11360 bytes
SHA-256: 05edc492bcc1143cc2367a8d0f6a8d3ec88bc82523c42e5d5131e0b94da56ef2

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