Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dcdd40cd29385dc…

MALICIOUS

PDF

74.9 KB Created: 2020-11-05 22:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d3fc618cd678d267e2819c185053b6e7 SHA-1: d319226d30f9154859d2145addc93136740670b1 SHA-256: 8dcdd40cd29385dced9124147c016ac10606535bb0bb57aa107544895baed2fc
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://cctraff.ru/123?keyword=nuclear+fission+and+fusion+diagram In PDF document text
    • https://rodekimixew.weebly.com/uploads/1/3/4/3/134314341/luwubakujetenapavez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383805/normal_5fa0dd5fbe2a4.pdfIn PDF document text
    • https://gimelukisisira.weebly.com/uploads/1/3/4/0/134040832/aa37b74b.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/zafaronivaj/24058812888.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/30478079486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ea3d9d-db42-467f-9a72-43f84dd05b2d/jixapasuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c271ba64-46fc-44f4-a3ea-51a6b4110396/rejevuvevizisulebuxolikaw.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/6435390657.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/29526108803.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/mabupafofabovegajidibeg.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/psychology_for_beginners.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD59 5308 bytes
SHA-256: 8c7a5847f9d2cbe8d42cc6f70d4173822664d80748e842c4375eaff76b274a2d
font_01_sfnt_off0000df5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5B 12316 bytes
SHA-256: 7bed3d0d66035528e57fa983302306203a40dce17da42a08004cb2b933fd8ed1
font_02_sfnt_off00010978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10978 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61