Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a960680d902413…

MALICIOUS

PDF

38.6 KB Created: 2020-11-05 04:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cbc27033f1b147cee1c6e15774344aa6 SHA-1: 2b8a624f5089ca25530d5cc2bf56354c2772f1f5 SHA-256: 27a960680d902413d1e61c4fbaecfafc557b3c9b3388800d6df9e9ec49047605
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=programming+in+lua+fourth+edition+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_5f87cc5d05c39.pdfIn PDF document text
    • https://nepuvaduwixoki.weebly.com/uploads/1/3/4/5/134525355/6186954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458826/normal_5fa340a731425.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/8857289.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386607/normal_5f8d4498440ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5f913e2273d6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420459/normal_5f9e8a84e88e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384167/normal_5f93ea8e560e3.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/6c9a91cd-57fe-4fd7-8c30-7a8af6cf25c2/bizifiwolipopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee56672-ba66-4f7f-afb6-d0f9f43ddf9a/gijopobuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71b33800-00b7-45b4-9194-51f9f62693b7/xabeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9259b306-1fdc-467b-9190-f238c5c47805/36783146506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df04d109-e86f-46a8-ae44-38c27e8e34f5/natorutevizonuruxululotav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a63bed05-81bf-46c2-806d-a0022a37f148/majurutiporomur.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_off000058a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58A6 5276 bytes
SHA-256: ea1c48570897e2464d0a937f743dbfbd1c9d6fc8e07e97901b87f0fa61cbb539
font_01_sfnt_off00006a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A70 10532 bytes
SHA-256: 046af299b66e94860ddc3e1097021c113aebf14f4d3fb8ab58ad803a2a47cdc1