Malicious PDF — malware analysis report

Static analysis result for SHA-256 3beed779d12a026a…

MALICIOUS

PDF

51.7 KB Created: 2020-10-31 17:19:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6d0b77bdcbd71af880319f2f7c7d1c63 SHA-1: dacab9cce9e64e99dfbcdd85a9d2e081606c69a6 SHA-256: 3beed779d12a026aeb07cc694f01ecacd16cd35f39dad28f59ea2fb426b62181
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/123?keyword=ss7g2+enduring+understanding%252Fessential+questions+and+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405922/normal_5f91d1f84d9fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f8fe7752f387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373281/normal_5f938109885ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422133/normal_5f97fdf52d745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383802/normal_5f90954e5d00b.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/f865e722-58f1-4e34-a5fa-8d4072797e0e/62680444744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c2c2e5-a05c-49d7-a5c0-fb7f151a023e/wetur.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/analog_clock_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9417424-bcff-4e68-92a9-63606787dcca/tezebume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56f238c-aef2-4f04-9f30-b24955a870d7/delitos_y_amenazas_del_comercio_elec.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/the_ridge_rec_center_summer_camps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/757121e4-da50-4e11-bb63-3e6ec4bf0322/60397761537.pdfIn PDF document text
    • https://s3.amazonaws.com/potevip/44878051347.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/sudivosafafasoz.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_off0000879c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879C 5560 bytes
SHA-256: 8fb2c7ac99ed27d99d8edf3211bf2a1639fb3ce550b234fe159f0974f963ff98
font_01_sfnt_off00009aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AAF 11312 bytes
SHA-256: 52e32dfbed6b109154ef08481b68cf4ed14a61fad30bd51e1785b22df0c3a520