Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d507b10b02889e…

MALICIOUS

PDF

38.8 KB Created: 2020-11-09 12:55:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 005e8f10588adc1e30eb8d4d70206939 SHA-1: d2de32ed4a21097ee8079c708ebdfd9283e15b9a SHA-256: 73d507b10b02889e6a81ec3313825fe9a18ab46ed444193bd3711173800e958c
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://trafffi.ru/aws?keyword=gear+pump+application PDF link annotation
    • https://wigegavevimuxak.weebly.com/uploads/1/3/4/1/134132972/janunawo.pdfIn PDF document text
    • https://kadefetu.weebly.com/uploads/1/3/4/4/134471860/3a646639f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388274/normal_5f9ecbf0d615a.pdfIn PDF document text
    • https://xuzelakojit.weebly.com/uploads/1/3/4/5/134593048/ranalodini-fabeverag-vawigoluk-digira.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/wilugugo/princeton_university_map.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/wrox_professional_asp.net_mvc_5.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/fupoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44fa961e-adfb-4d17-9055-5fde8d408c41/aashto_wb_50.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/download_google_chrome_free_bg.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/matekofuw.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/summoners_war_codes_june.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_off000059b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59B4 4932 bytes
SHA-256: 05138a5f07afe090bf394a5100065838a4019161b982c4964ef2ca964c0d99bc
font_01_sfnt_off00006a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6B 10860 bytes
SHA-256: 6ee1a5777638321bd8985f192f388e2afd6b4ae3e4974dde1546be19b29aef38