Malicious PDF — malware analysis report

Static analysis result for SHA-256 28a53b57c2ff8233…

MALICIOUS

PDF

33.4 KB Created: 2020-11-07 15:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ad8478d5c62a1f50f8f7fc96c606efa5 SHA-1: d7fee39b332d1401607c6260545caa611d2a55c4 SHA-256: 28a53b57c2ff8233f632ae3562eb811bfb81808de8db617a43bff4bc7a74075d
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a fake browser/software-install lure. 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 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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?keyword=snowman+christmas+tree+toppers+lighted In PDF document text
    • https://cdn-cms.f-static.net/uploads/4411503/normal_5f98eb85e6db6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f890822c8681.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/293363ac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454289/normal_5fa4b1491e7ff.pdfIn PDF document text
    • https://dikajumexuw.weebly.com/uploads/1/3/4/3/134324924/e1a5ce6c.pdfIn PDF document text
    • https://pesirirovozag.weebly.com/uploads/1/3/4/3/134316115/9d06712f6197.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/c88fc363-d6da-4d22-b439-ac863a6fbfaf/miviwisoreduv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e8ee251-7a44-4b68-a822-53568d1f6209/33672549695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02148e07-3041-4cc4-9ba7-007db9045aae/fogaduragapumufusexubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67254c97-422b-48d7-8710-19b75d5fb0c5/50793011974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8374888-49c2-449e-813c-70f4b568df6e/mafanixalelemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9794d2f9-4ee3-458f-bdd0-86c754ec63ee/vigesixelibadedujudoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fef034d-f41f-4242-b104-1cc944ecd0a0/pirobokugibepivig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b88c24b6-66b5-4b1d-8acd-43857396335a/34641133393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5aab3be-d612-45a3-9ca3-f9a422bfd221/trinity_basin_preparatory_calendar.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45B7 5680 bytes
SHA-256: f6de2ed15b6f6b117c079b00f08a6d3d6fde5690a3d81a6ac339d74b6a0bd9c0
font_01_sfnt_off000058ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58ED 9292 bytes
SHA-256: b8c518e53bfb3aeee3aaad782bff73f967f135ca2513adf33f633a198152db73

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