Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a66bd728d83e1a…

MALICIOUS

PDF

35.1 KB Created: 2020-11-02 07:02:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c3e11d876ff60e3039c31dfc2fbaa18d SHA-1: 119b727fa248bdc70946811210614860cccc3c8d SHA-256: c8a66bd728d83e1a0b4a48fedf5ce08cd1c8f078ad7290ea70706765c236a1b5
94 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 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://cctraff.ru/strik?keyword=2012+honda+foreman+500+owners+manual In PDF document text
    • https://wopuremob.weebly.com/uploads/1/3/2/6/132696580/dipajete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_5f8840c2e5ba5.pdfIn PDF document text
    • https://mivopolidenez.weebly.com/uploads/1/3/4/3/134349928/kovujepudiruvujo.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/a323e7edee54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_5f92145297a42.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/pukiza/recursos_de_afrontamiento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4594/0128/files/ecological_succession_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6240/1435/files/39737939785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4073/2851/files/arcane_archer_build_pathfinder_kingmaker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/63795257741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a64ddceb-1ffa-4ffe-bcf8-d756a22cc5fb/xeginepadoxanevuzukawowuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4041d760-e928-406b-acf3-515a3ff61969/54195631698.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/3843659693.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_off0000494c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x494C 5596 bytes
SHA-256: 7ce8a95a1f5c47bd5baf05f7b98aa3cc76a01d0f028ccba2bb572db3adf6b3b8
font_01_sfnt_off00005c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C45 10352 bytes
SHA-256: 5cefd5dc036962d36038f4eb23f44a024a40c2798f282aa6c84e0556e1d7b5e9