Malicious PDF — malware analysis report

Static analysis result for SHA-256 780c0f8b33388b75…

MALICIOUS

PDF

36.9 KB Created: 2020-11-03 14:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ec3a3cdb1e0bc6d60d3173367a21bd60 SHA-1: 9c8cfd70f03561202a2a59525d285948dfb35bc9 SHA-256: 780c0f8b33388b755e93bc2b44b5fa31f3edb259ec20676a2634f86a73a82a30
94 Risk Score

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/123?keyword=csi+web+adventures+case+4+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_5f912e52965dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445869/normal_5f9f3a3d4620b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_5f942b66c4354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f87029f1f7cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f8721ca4b952.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_5f9f6a9975f3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377095/normal_5f9b87908ce50.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/negonanopix/77070620023.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/bopubiwobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/482f0946-5ac3-42b4-8752-ea8a8574e2f8/34107428607.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/pinnacle_studio_14_free_download_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/juruvatovelodakebosej.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_off00005302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5302 5352 bytes
SHA-256: 5e3469a0a8189fb43eb0fad08b856335ab249be776ac3a3b1369df430933f2a3
font_01_sfnt_off00006566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6566 9828 bytes
SHA-256: fa6f4a3374dd183e26b3d1177e9d43fa7f3d3cb940e846c280bbd52c0b7549cb