Malicious PDF — malware analysis report

Static analysis result for SHA-256 b967af25a4f180cc…

MALICIOUS

PDF

49.6 KB Created: 2020-10-30 11:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5efecfa62acee706a183ff163ec06099 SHA-1: 199001eece79b0b55a8d4a5545aeb21e1d3c136a SHA-256: b967af25a4f180cc5d999e1b5e25b27c42acfbd13f4e8e7a3b8e7766ba853461
94 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, disguised as an academic resource. The ML classifier strongly indicates maliciousness. While no scripts were directly extracted, the presence of a malicious URL within the document body suggests an attempt to redirect the user to a phishing or malware distribution site.

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=ap+world+history+dbq+scoring+rubric In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383304/normal_5f90e44a15454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385038/normal_5f8e7ea1cb16f.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/91e2537c-dddb-457a-8cbd-42d5946ae8c4/rocket_league_animated_decals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50659d02-a222-4ce9-adfb-e74784e69d85/27150676900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae5d0d45-1bc0-4834-b248-3ecfd0abc8de/7186216587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9735719-2ae2-4f69-a974-892c5d7ade2a/dojegokag.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/nexejoxukunomedowalupexib.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/navosolobapisapeja.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/40432156030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aebb853-c99f-4c0f-b00e-cf00f9c95045/nagolapek.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/pdf_to_autocad_drawing_converter_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1852e270-bc1a-4ea9-ae1c-7d90de7b1387/62555593706.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9B 5576 bytes
SHA-256: 2ed7b4470d99eec0e4d63374b1371a85b524b7248f6b7888050638b642874bf3
font_01_sfnt_off0000708a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708A 3364 bytes
SHA-256: 5e90b80db757ff10438836ed423f26e5e97d72d05aeefeee0cb03d3473537a1e
font_02_sfnt_off00007e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E49 10716 bytes
SHA-256: 7b38c91bbb8747df89b82a98b295813f4fdbcaac930f93ee64dbc2d04696b5d2
font_03_sfnt_off0000a26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA26B 16116 bytes
SHA-256: 3dae81b76154e7c62b3b0d30507344c78f02ee9172d09a03fe7a9af96af9e849

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