Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d656a90cab034c2…

MALICIOUS

PDF

89.3 KB Created: 2020-12-09 05:57:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4b6dab1f44b50dbb8ceab80d076e8dbb SHA-1: ba57eccdbcb5c8bcab2947744be5af6ee9e3d6df SHA-256: 3d656a90cab034c2747207a9014af8199d06341f9a85e6b10963bb2c17702b71
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 0.9998

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/123?utm_term=shelter+rock+school+manhasset+death In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470405/normal_5fbb03f226d54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385876/normal_5fa7f3130ada7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465015/normal_5fa7e4e295962.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc34073df132613bbcce8b2/t/5fcb0fc7551bdc47e7a22517/1607143367879/41772988035.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fb6b88c99b6d37a78a63/t/5fc188fe9ee0f32b878d0a8e/1606519039312/mage_the_awakening_2nd_edition_character_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54ac7ab3-c4b6-4289-ab33-5a378a7df3b5/los_hermanos_barron_discografia.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd3afea72eb64407c975fe/1606236927264/55225053838.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc525d588c99b6d37c2e2ed/t/5fc6a9143c6ccf69f34aa34d/1606854932928/star_traders_frontiers_crew_combat_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/65343201878.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27eb48ef7301f8b1ae02f/t/5fcc51ead235d37878bb2ebc/1607225834726/popefogamorakopu.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/god_and_the_state_mikhail_bakunin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29e0dc30a162e0c5d7436/t/5fce7aa3a2b4e84e5f79b213/1607367332043/47114063940.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56aec88c99b6d37c5a745/t/5fcffd3eec2ae40ed7369eb4/1607466303547/59724404319.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_off00011d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D24 5344 bytes
SHA-256: 92adf492d86c32c29b4f1df1857262e1dd49e606403604f427a0ebf31d3ad57c
font_01_sfnt_off00012f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F23 12076 bytes
SHA-256: dd33df84ac8b1e346e83c85ee4ed3efe09302123bc8bb02a75dc620514a4931d

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