Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb07b8e11d101cc5…

MALICIOUS

PDF

48.8 KB Created: 2020-11-06 16:53:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 19751ea0314108096e0562e37b00f6cb SHA-1: d7a77096c5944fd058b97e01c57354127209c874 SHA-256: fb07b8e11d101cc5fa5a8efdf21779314fd5deebb5c013e57d92ae5896853627
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings strongly suggest malicious intent, likely to lure the user to a compromised 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/aws?keyword=far+traveler+dnd+5e In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386620/normal_5f8d06a144808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424692/normal_5f9d375f80c4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_5f96ef58549b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402953/normal_5fa0b54b22e53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450345/normal_5fa1b31358ceb.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/jedobufudajewu/changing_dimensions_perimeter_and_area_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/mafazenimarasamadoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c72862-fbf1-4aff-94a9-bbc7a4354297/6522913506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ef82377-48ef-4739-9a86-0fa2b5709960/doxelowifivekomuwamanekow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c352df1-1963-4401-8863-2f6b635743b9/killing_mr_griffin.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/kivokoseg.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/pre_world_war_1_europe_map_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/18_mbps_speed.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_off00008318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8318 4780 bytes
SHA-256: ec9ef6c66b27a5aa800511a6174494fae9004dca6af9b2bdc20de188df53fa6e
font_01_sfnt_off00009371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9371 10428 bytes
SHA-256: dd54229b496f5df34497a6ada37d072fd4a0114fdcd8c63236b225c91260994a

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