Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb8a9c0403ee287…

MALICIOUS

PDF

40.9 KB Created: 2020-11-06 02:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2021d8f225b7cec2f887090faf15bb6b SHA-1: 7ddb9db78d568fe20629fbc9e3c23bbc66ecc7ab SHA-256: 2eb8a9c0403ee28792bfadea460bbfc88710e8d89f0cd030fbbec52ed992e886
96 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/aws?keyword=what+is+oc3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405194/normal_5fa47bd2a81ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403808/normal_5fa09bc9b3916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8740f73a2f5.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/d1fdc5184e8288b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f93fe1a1c92b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452161/normal_5fa30982e8c84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_5f9d17e14e892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f875ed12785d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414331/normal_5f95caddb8ddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_5f8e186924fcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411935/normal_5f9f82cd80cee.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/buxoparadazegu/61200919211.pdfIn PDF document text
    • https://s3.amazonaws.com/kidugodofunose/hantek_6022be_schematic.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_off00006113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6113 4936 bytes
SHA-256: 6381b95bc1fdb67423f03eaaed56a141c80b0dd144f887a6e22f3ececb4dab8b
font_01_sfnt_off000071e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E9 10996 bytes
SHA-256: 16207ea192e6932742f571e3406dc4736c635f888cd66ffec3da7862fde28d2a