Malicious PDF — malware analysis report

Static analysis result for SHA-256 738eb1eebb8f6712…

MALICIOUS

PDF

36.7 KB Created: 2020-10-30 11:32:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f11fefae9bf10cc2110bc345d16efd71 SHA-1: d0c73d8bfd408a7b1e30c4236430b19e278cd64a SHA-256: 738eb1eebb8f6712331004b27fdd8ee44d5ed4419b44ef707c772507f223c694
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=application+of+quadratic+functions+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380213/normal_5f980793b18f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f8726ae362f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376380/normal_5f91c79a3270d.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ramugimexixepaba.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/dufofugomimod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422180/normal_5f98c256e57a9.pdfIn PDF document text
    • https://sesorefamasupuv.weebly.com/uploads/1/3/1/0/131071262/gevelozokoruwaxobud.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/a0bfb02d-5663-4aed-9334-4cfa1f58be9f/retegixiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9116/5333/files/urinary_tract_infection_canadian_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66a539a3-6fd4-4805-bcff-8b45ee160c4c/77147018724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19a6ba06-0d4f-4444-8741-974afbde97b7/algebra_1_memes.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_off00004ebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EBD 5516 bytes
SHA-256: a823b8b520730e9fa1322701c8ea179554b59260abf813b1ab23ac7adb7b09be
font_01_sfnt_off0000618c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618C 10708 bytes
SHA-256: bdf5d94e1920827a2d68a1750930ab13f051295e709b2091e9d0a3aa39427496