Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9851597ed7fbf6…

MALICIOUS

PDF

42.2 KB Created: 2020-11-05 20:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c47a12d8b0654022c897ecccf3ec2a13 SHA-1: 17bdf7445bf8e12d1a830fd781b2c79422ee8ec1 SHA-256: 9b9851597ed7fbf65bc0fe87424b0a27f772c3cebbda6d7e53b175d2baf40ea1
94 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to lure the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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?keyword=fat+princess+piece+of+cake+trophy+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386606/normal_5f919b22487ef.pdfIn PDF document text
    • https://duxuremi.weebly.com/uploads/1/3/4/6/134623812/6268156.pdfIn PDF document text
    • https://xazaguzomolak.weebly.com/uploads/1/3/4/3/134375957/8002416.pdfIn PDF document text
    • https://toreliga.weebly.com/uploads/1/3/4/3/134335880/ladirikokovoliz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f88a5b337beb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5f8c735e3445c.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/zuwimadaneb/acgih_2019_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/adobe_lightroom_torrent_magnet.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/44183631974.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/dixoreni.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/armored_core_for_answer_063ans.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_off00006406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6406 5504 bytes
SHA-256: 3ef3d7bf24d64e3b0ce4f1f89aa102722f07b7bb3afe14128b9035b0816fd035
font_01_sfnt_off000076c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76C9 10848 bytes
SHA-256: da7e3e5117b5f7d41627c6b8136e3f13c536194328ff31487c65eb1cc253a534

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