Malicious PDF — malware analysis report

Static analysis result for SHA-256 27fcbada06da4966…

MALICIOUS

PDF

75.8 KB Created: 2020-12-07 08:29:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 579007fdc8f7e1be39cc12c23c700c65 SHA-1: 98f4e5d9fec16f1971b7b27ca04e764149781881 SHA-256: 27fcbada06da49662bc6f7cadb8b5835ab46f0bbfed47f2cd4db22668367655f
154 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 and an ML classifier. 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 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://cctraff.ru/123?utm_term=landmarks+in+humanities+3rd+edition+pdf+free In PDF document text
    • https://static.s123-cdn-static.com/uploads/4408479/normal_5fcb21df35be6.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/20471007-5dfa-42ee-9f34-9ff9af10a93e/77085169734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e01ac46-08eb-4854-84b1-8643b0b5485c/favapumoligafuletuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051ce10d-a7cd-49c2-8ae1-d28f131af42d/joxukuwujexuka.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc655159955c744b5606702/t/5fc86c2bd17d55300fae0d9a/1606970411474/field_hockey_coaching_jobs_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e0d7a62-3daa-4745-b3be-b3bf797722b5/fabriquer_son_ampli_a_lampe_hifi.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/acrylic_material_properties.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed2d6e1f-2f59-4448-b971-d60672059f82/81194838706.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/trumpet_music_sheets_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216a480a-6fb2-439e-9537-eafe27793f11/pampered_chef_grill_press_recipes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5e18cb3e0f577146f2cb/1606376985466/44622845936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68566bad-8aef-45ba-bcfa-9e19af1b5881/formulas_de_calor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60508ec6-fc3c-431e-bad8-08b0a4a4d1ff/45024597464.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD163 5420 bytes
SHA-256: 6a114c6702c8d2c3f80e976784a79834bafb46aa3863bab48537789c978a30d8
font_01_sfnt_off0000e3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AB 10224 bytes
SHA-256: 99b6fefd9dd1c8c90c467d094b58825146d169f51254f119f3e7ba5bdf0400cc
font_02_sfnt_off000106bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BC 17168 bytes
SHA-256: e100b0ce9faa893613a8ab676e182ac1fbeb9e48df544cc0793f28a7a4869452

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