Malicious PDF — malware analysis report

Static analysis result for SHA-256 5157d7d4ee2e0c22…

MALICIOUS

PDF

264.2 KB Created: 2020-10-30 19:02:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 063481bbc1a542f97a7bfc85b8948f01 SHA-1: 2208358d1096f815043dafd6a1b872261292b8f0 SHA-256: 5157d7d4ee2e0c22d282c3d7e15f1c79fece683f4680823611427ece50b0ba82
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 an attempt to lead the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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=remington+870+pistol+grip+accessories In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386842/normal_5f953b9108360.pdfIn PDF document text
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/4939083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f9b9f917d1b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f872d172b4c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409609/normal_5f970a7b3b2b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393644/normal_5f93cc430ec9c.pdfIn PDF document text
    • https://zenefuzivoxog.weebly.com/uploads/1/3/4/1/134108933/xisomorixupudex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416151/normal_5f97fed3ccc97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405190/normal_5f96013f2faaf.pdfIn PDF document text
    • https://turikiripejuz.weebly.com/uploads/1/3/4/5/134501804/liget_muxozuxenub_bevafisokuf_xomarekasim.pdfIn PDF document text
    • https://devuzagobeli.weebly.com/uploads/1/3/4/4/134431767/sukimizaror.pdfIn PDF document text
    • https://wasivexuliji.weebly.com/uploads/1/3/4/2/134236061/vuriwojijazunu_gilevavedu_budirexewepin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f8d14e002b40.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/6311c6e9-20bc-41f4-926b-06c62387dc4b/energy_transfer_in_living_organisms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/257f42a6-91c7-4282-97a1-28e0df1de8f7/15164445652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6df6d2d-cf17-4da2-b7f3-4e0d3ca16a23/55563045953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d54ae2-2b49-48f4-8aae-e2fafeb831cf/gikeforavoxo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003c5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C5C8 3968 bytes
SHA-256: 7a9ed836c80149c52fd919d63afdf230b099a3ae3fd4305c565c55a10fafc3de
font_01_sfnt_off0003d3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D3D7 5676 bytes
SHA-256: 33191ecd4822eb11e6ac3a52fee6cdba9cf1322f4bdd8ee229d6edc8759c9579
font_02_sfnt_off0003e712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E712 13204 bytes
SHA-256: 9f121f7e3a94af10794feb883793b4a8b8bd5fc63ff0fce3b31af36670b53280

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