Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c18275ce9a9bbef…

MALICIOUS

PDF

62.4 KB Created: 2020-12-18 14:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 21e9cfd8433f1f517d96bfcdd83fc321 SHA-1: 1ce7209f2ca8f6e432dd48e978d075c9d7cd1cd3 SHA-256: 3c18275ce9a9bbefff850c5b5e0b1fc62df6198288f3c76d4db40c13ca4a0c9e
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=pokemon+remake+apk+2019'. This URL is presented in a context that suggests a lure related to a 'Pokemon remake apk 2019'. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a high likelihood of it being used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=pokemon+remake+apk+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403561/normal_5f912483a6d08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452169/normal_5fdc464a1b29c.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/6179378c-3f89-4149-b4c0-b0f0c4f17dc4/zodun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b82b1914-4f9e-4ab9-b732-450e5aecec91/76979503712.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe13af3c6ccf69f32675d8/1606292416762/turnigy_plush_40a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5001af00-a9d2-4f91-be82-095af11ab567/voxudutira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7f36676-7f72-449c-8c23-cefaef1652d7/under_cabinet_knife_storage_hinges.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e85027a199023ab5619d/t/5fc1e52bcb3e0f577194a3af/1606542635606/59140149427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a002413-09b5-4e35-8edf-76c1ad5c0fcd/ligugamowinujipepedu.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/marathi_kadambari_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1755c1ea-dfea-4644-aa28-82de8ed1f3c6/76201114041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc3d3b72-e475-4c94-b25b-f42063a40822/gugeximi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9edec41d-2eff-43f3-b92b-80c885869799/letra_m_mayuscula_y_minuscula_para_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7c26524-417a-460e-81a7-bbdcbba46a37/geraxizenim.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_off0000b1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C3 5300 bytes
SHA-256: 120be516949dfc1d9465886cd2b8119a0fc98d351794a8d5bd3e07670d36125a
font_01_sfnt_off0000c3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3BB 13872 bytes
SHA-256: b5c800428d4aeab221bbcc700b703fcfc72437f76a22c2b5196fddc9418281ed

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