Malicious PDF — malware analysis report

Static analysis result for SHA-256 7508b5311497bba9…

MALICIOUS

PDF

43.2 KB Created: 2020-11-09 14:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 56cf03d32f083b61315dc21f63c87bc0 SHA-1: 29a8c2a43bed0af7f73d3a4f7a3b0b7704dca647 SHA-256: 7508b5311497bba93c5e5471d63fb60d22a074c49b9b429e932fb5cc30443043
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://traffine.ru/aws?keyword=emerald+nightmare+raid+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5fa6ff7d85895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444647/normal_5f9f8fa79cade.pdfIn PDF document text
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/rexowuvex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f8f26a77f4f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_5f8a1c0b27b61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451353/normal_5fa0ba32b6e2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388406/normal_5f8d4e7c4c5fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5f988a3960759.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/d235bc7e-6076-4553-815b-24000727f181/22865443094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4936c3c3-77de-4cac-9d72-6322365c379c/kisiboza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7e69ebc-eb67-49a4-a936-6a51f97486d9/limuwebazaxapukuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3609ac57-7d34-4ad9-8cca-8d388457c5e6/666866777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d64937f9-7b1f-4242-97f2-60f584e0ad1e/12949760578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e24447-4c89-4bbd-86bb-be7aa571441f/90381418201.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_off00006937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6937 5016 bytes
SHA-256: 3cf1aca59b39172eccfce356f649598e7aed2c18e4b9aa1185412d625c7d12ea
font_01_sfnt_off00007a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A13 10724 bytes
SHA-256: 71942084e2365bc1dd597f9f37948f0c0ad620d3760af5d8832e76254c2324a7