Malicious PDF — malware analysis report

Static analysis result for SHA-256 d930bc26cce2e089…

MALICIOUS

PDF

80.6 KB Created: 2020-11-05 23:57:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4efe1f0b1dcc0f36883a0a5afed2788c SHA-1: ed50f917a8d47a3d0dc4619f6142434921fe05af SHA-256: d930bc26cce2e08950920937553ead948851f4b1aac0e7866dc973ac5ba229df
94 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded content, though heavily obfuscated, appears to contain the malicious URL, suggesting an attempt to trick the user into visiting a harmful site. The ML classifier also strongly indicated maliciousness.

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/strik?keyword=resto+druid+leveling+guide+bfa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370092/normal_5f9beb9eac815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f8982f624900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f91bf6dbfd02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381289/normal_5f8cc65b699c8.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/6dc35f03-205e-4456-b986-cffcff73b740/tobugaxukarinumanimebul.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/fumuzewunikiga.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/modalofobonujibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/682a6c4f-204f-48c9-94b5-39d057bbc774/tibis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0569a8-ebf4-4d70-a8b3-286cd026d582/borderlands_the_pre_sequel_grinder_recipes_xbox_one.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b74059-8b48-4883-b41a-5fd0074b72d4/21181633367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dae3d8d-f74f-4d16-81ec-dff65dfcadb1/21288566699.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/vetupavax.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_off0000fd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6A 5280 bytes
SHA-256: f14faa15b894a363e4c6dedfd6c01c9978a5edaa70bdce231ffc64598ec1b888
font_01_sfnt_off00010f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F76 11324 bytes
SHA-256: 8ead94fdb145c4e22d3aa24ceaef59c797332001414cb4d2cc004cfaeb492b1a

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