Malicious PDF — malware analysis report

Static analysis result for SHA-256 f81ce6b55bf109d0…

MALICIOUS

PDF

46.1 KB Created: 2020-11-01 08:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ef77d1b86e211a9acec42afe67bb713b SHA-1: 92ddd0e63b46ea45f0b9d235c8020d7cec8dbaa9 SHA-256: f81ce6b55bf109d0948e0026e9cf5d8213f7af070fe6e7740d4a0aed3f3afc41
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://ttraff.com/123?keyword=uber+san+diego+phone+number In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f88bf175c06a.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/ce6e1543-aa0e-4485-9135-29950b5a2dfe/vadutiwunod.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/labavuxurukudogolipit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d82c1aba-2fe1-4fb1-a1d2-d17e5147b1ef/kimozogepamutuvoseki.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/les_apocryphes_bibliques.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/4_horsemen_workout.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/kupapeti.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/guxune.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/star_wars_complete_vehicles.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/13501125579.pdfIn PDF document text
    • https://s3.amazonaws.com/kepevipawit/psychoanalysis_download.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/tirokodigimogexigelakomad.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/ikea_catalogue_singapore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b177d500-02cf-404f-ab14-fcc7fd2c92cd/22755748798.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_off0000730a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x730A 5472 bytes
SHA-256: 08d9aae6bc3a40bd465a690353927f0475f684cbdb317b3b7e8b7df2744142a1
font_01_sfnt_off00008573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8573 11656 bytes
SHA-256: 7268bc4858caba7106aeff7db7d8223974e53dc6593f381c43957ef685421916

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