Malicious PDF — malware analysis report

Static analysis result for SHA-256 9684f919d0329a5a…

MALICIOUS

PDF

64.8 KB Created: 2020-12-19 01:15:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c7a4c968470e31192e42df79a8e5c5e4 SHA-1: 6561a3752b6ca038b7a4f264d5842c969a4c65d5 SHA-256: 9684f919d0329a5a60f089699aba6f2e6d7dea90f18d913691a2a4c0535cdabf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and 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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=classroom+management+philosophy+quotes PDF link annotation
    • https://sigogaxeba.weebly.com/uploads/1/3/4/6/134620414/xosuzegevot-volarinux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392659/normal_5fb2f583a7825.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/5cf5e4f7-763b-4904-9394-70489a9c162f/tcp_ip_protocols.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4948e4-f9df-47e1-8e0e-fe3ae99c36ac/22305724229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69438a57-c358-4380-9395-f766680527f6/xavibodebezabur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e19cc19f-749a-4439-b5a2-e8acd607387f/rororizelizalupoxovewe.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/68470888376.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/mobdro_app_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/172bab9f-a457-4725-9bf6-9e0973f3ce71/basilica_julia_interior.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/14827043063.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/qcm_bourgeois_gentilhomme.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_off0000c1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1EC 5364 bytes
SHA-256: ed239126593e9cdd7a27413487841205d1bcc5c448dcb704a767741e2c76a67d
font_01_sfnt_off0000d400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD400 10152 bytes
SHA-256: 18674a13726f0aaeb926ff10f618700efd35659f0ff04dde3c99ce5490ae1f91