Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb88559de9738bc…

MALICIOUS

PDF

68.5 KB Created: 2020-12-22 01:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 03ba30966cddafeddc1d7aa6074b7158 SHA-1: 59cfd313167401f07b408c248d697d7b7d041643 SHA-256: 0bb88559de9738bcf2a020e6db3d94adfb9caf84585148573601c63d7035020f
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a heuristic indicating an embedded URI pointing to a suspicious URL related to 'Centurylink email login problems'. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a password-protected archive lure suggests an attempt to bypass security controls by encrypting a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/strik?utm_term=centurylink+email+login+problems PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404983/normal_5fc73c2092607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403951/normal_5f9a7e56d552b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391602/normal_5f91a9a5ebf82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/de4d33f8-2437-4f48-936b-413a59b57c93/popcorn_label_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde965d822e9979dac69868/t/5fded6b11c66f52f5f93f67e/1608439474543/delaware_corporation_annual_franchise_tax_report.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdec0a62dcd53187f2068e5/t/5fdecd6242c0045a33044392/1608437091174/66167528128.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f1725bcb0228a282b335/t/5fc935726309f411b669f1f5/1607021938613/68464583110.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc531585bcb0228a29e8486/t/5fd6f7d589566e781f645fdf/1607923671829/55782732691.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/kalugodukuvagakubat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0ccf452-d34f-4b19-8158-88355af20297/3924038228.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc576008ef7301f8b2fc014/t/5fc7bca1a3696915e230ae7d/1606925474134/tower_defense_crush_mod_apk_latest_version.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f7235687f52b6b817f64/t/5fc25bd9a97599144e43de1d/1606573019149/gunvault_gv2000s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/jetedonazadijitudu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EE 5348 bytes
SHA-256: 2ac264450f1a919507cde6af1a26c2057fb929b13a7812fb0fbe4c89cad988f1
font_01_sfnt_off0000d507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD507 10100 bytes
SHA-256: 4cc46c9ce2a03f5ab4736757c8234ec3db22351ba49233a405d6ff1939ec8061
font_02_sfnt_off0000f759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF759 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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