Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c15d756fdbb226…

MALICIOUS

PDF

42.8 KB Created: 2020-11-04 06:09:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 959f259f154c01706b0e9d3d1f1920a8 SHA-1: de70e050299209f51dc89b4e0f259305bec30173 SHA-256: 56c15d756fdbb22633ac1420b6f91c7e5e62feddef72f14b70a1afcca0b197c4
94 Risk Score
Tags
free-cdn-ebook-manual-lure

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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/strik?keyword=clash+of+clans+apk+fire+october+2019 In PDF document text
    • https://velizixevapejaj.weebly.com/uploads/1/3/4/3/134376636/rexidezelu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406241/normal_5f93b68d97b09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5f8b59d9259c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443812/normal_5f9da07cd44a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_5f907c41420fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_5f9cac7f4ff57.pdfIn PDF document text
    • https://ligapixoxos.weebly.com/uploads/1/3/4/3/134378271/9198959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f8d17c2440c1.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/31f4bc6f-50ef-4a06-8c53-e90eb4162483/penat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95044bde-bbe8-4059-9033-e157248d7c28/xokolomadujefuliwotasog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcb1f168-3d5e-4ee9-844f-f2379f1fcc10/14364686179.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/gutijisovobono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5551e761-727d-4bf3-9a50-a2598a644c78/august_2018_regents_answers_geometry.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/lidimarepuduxanuzew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9f4e9b7-e2cf-4565-b529-8d040b0b8e91/86304030633.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_off00006569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6569 5692 bytes
SHA-256: 58c6afa4991833c43d78c4564fa2f60634fd661e07c78d2ad8c0443eee178823
font_01_sfnt_off000078bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BD 11440 bytes
SHA-256: 56ed0e4bb929624ea8b55dc5e3e992ee1af2cd689ea675b052d391d69f0d69b8

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