Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e9af07cff0f148…

MALICIOUS

PDF

80.0 KB Created: 2020-12-21 06:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: eb86db1b8741c41eb6b1a14cf83962c7 SHA-1: 20a1792f6be3cdd26d51ba2b88b5aa842c36d085 SHA-256: e0e9af07cff0f148e73a6655d53be04a212e77603ee95af3e1bbf82854869887
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and 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 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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?utm_term=best+ww2+american+planes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4452594/normal_5fbfce52289ff.pdfIn PDF document text
    • https://nobuzuza.weebly.com/uploads/1/3/4/7/134757083/c7cddf5dfb496b2.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/e6a965eee040799.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478669/normal_5fa5a5692e2d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_5fd67bfcb6f3d.pdfIn PDF document text
    • https://bapepewemeg.weebly.com/uploads/1/3/4/7/134702997/8813c4d9a2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420037/normal_5fb296885ad7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413235/normal_5fa5ecbe2324b.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/waxejajinigafu/logitech_hd_720p_driver_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55e6e085bf90c0e1aeabc/t/5fcb6022a3bc3d19152d653f/1607163938736/66244762459.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/adobe_acrobat_editor_free_download_software.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/vososuwadufavuw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce509df32955146e10cd7a/t/5fd6ab9d9264095525df0b7d/1607904158065/blackshot_sea_free_for_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c45068612547ed7f5dc1/t/5fcf5a0d7379aa3597768b65/1607424526107/jumesakel.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/nejulavijalugaru.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eacbc14dfd36fef1915a/t/5fc3f4e43f75b166434e7956/1606677732836/allen_matkins_los_angeles_office.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2b6dda5bc066edfb157b0/t/5fcab595edb74d54089a47ab/1607120279219/94706240652.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_off0000f0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EA 5032 bytes
SHA-256: 8c9005d1412df8405d0286b0ecc9ccbee27f1b8cd2e71e506afb9fe95be018a5
font_01_sfnt_off000101ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101ED 10112 bytes
SHA-256: a0295e24c45ddc90aa3027d365fe8b0e75f2c76e528e5b1879a02c0b92bf30f7
font_02_sfnt_off000124a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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