Malicious PDF — malware analysis report

Static analysis result for SHA-256 c25a7e794e344db3…

MALICIOUS

PDF

44.0 KB Created: 2020-11-02 11:03:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 05a0292948da6581068ad7004203bfde SHA-1: 27cb33f81cca4b2d22b2533749ad8c3c40f8eb98 SHA-256: c25a7e794e344db3d6c818c3b1e576d0b23adcbe19643ffff79edb7e01536625
94 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 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 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://ggtraff.ru/strik?keyword=clear+sky+elementary+castle+rock+co In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385850/normal_5f9aad7b1f1ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_5f9cd8b5d9760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402014/normal_5f9b851929c8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383577/normal_5f9ecbce7792f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_5f8cbdc430bbc.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://s3.amazonaws.com/ganubifirigevi/development_across_the_lifespan_7th_edition_feldman_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/085d0abf-22cd-4665-a38c-524fc551878f/mukozinawotivuzaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18212df9-cf5a-4d52-83fb-8db735fc3b5a/bekegarufivewipajuvoded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd90a8b-06da-4563-a8e8-4f80e10b145b/the_exterminating_angels_full_movie_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc65390b-ca0b-4eb4-8b34-b6a5d2ddb388/benjamin_pellet_gun_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eac51cc5-69de-490b-9aab-0cd05bafeda2/jelepalikomorisexesuda.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/bofizefigogipa.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_off00005eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFF 4872 bytes
SHA-256: 3316c98c35b1c330a6f694ce9c895c7d9e7b723fe72cad673cdcb83230aa1496
font_01_sfnt_off00006f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F79 11044 bytes
SHA-256: b0766fb393548c58fe8e971032a5717825aa786029f2d63830dff981474428ee
font_02_sfnt_off0000955b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x955B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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