Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb07c412a7e658d3…

MALICIOUS

PDF

50.7 KB Created: 2020-10-31 03:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a2e6659812ae5495e60a11c7b3d2ca74 SHA-1: 9531d3e6a13924c22f8e423efd9fb1db96a2941c SHA-256: fb07c412a7e658d3dee1d37db278be43eee6a6765df0bec4bdc2ada4bf3e49dd
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, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the same URL and keywords related to 'Minecraft', suggesting a lure. The ML classifier also strongly flagged this PDF as malicious.

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://gettraff.ru/aws?keyword=minecraft+mob+grinder+1.16 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f8bc01321a55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_5f9391f3b736a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417137/normal_5f9c90ffd1c0a.pdfIn PDF document text
    • https://femevidawivuk.weebly.com/uploads/1/3/1/0/131071063/499abfbfd6ea8.pdfIn PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/piwatajumisu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_5f8d74e529900.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/subud/8627127801.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/the_book_thief_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/vita_classical_shade_guide_hue.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/divergence_theorem_cylindrical_coordinates.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/kadagaviserevu.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/35004724531.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/libro_aceites_esenciales.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_off000087cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CB 5512 bytes
SHA-256: 061ee44276714aecde0f38801167ba23a2fe49e79b201f774919765210e74164
font_01_sfnt_off00009a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A8E 10348 bytes
SHA-256: 99a865d97f64e9509a3d12fdf62c731df6e3a2062f26380b511a5c943a3923cf

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