Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04fbf73c69f2658…

MALICIOUS

PDF

42.6 KB Created: 2020-10-29 23:06:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5820637c187ceecebaeb1d2f3604eb5a SHA-1: 7cd9d29a9924e254a6db9141a144eb07ae0cbb91 SHA-256: d04fbf73c69f2658967bde0d7270790143e4527a6f5a2e6f029a73fbae6b4c07
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users interested in video games. The presence of multiple links to external PDFs and a malicious redirector suggests an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/aws?keyword=how+to+beat+necrozma+in+pokemon+ultra+sun+and+moon In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369915/normal_5f93bf1907ddc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5f8928027cecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5f88d60021e10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f876b931b261.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/7954cfb3bc810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402933/normal_5f99b4561337c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373239/normal_5f89c5fae34b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403127/normal_5f91e919417cc.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/mupukesunobaga/angle_of_elevation_and_depression_word_problems_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d635de61-0aad-4f4a-8591-f656228eb0cb/the_cherry_orchard_by_anton_chekhov.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/natobado.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/kewata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6878fa24-9d4e-4f64-a8e6-4523212e3174/rirofomarenut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c694bb2f-dd74-4072-8e4e-be1add63e692/batman_the_animated_series_script.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_off00006505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6505 5528 bytes
SHA-256: 406c65cd48892571e37af55bf7b5f9f1e906a80eddf5e5951c04eaa3f09d4cf7
font_01_sfnt_off000077ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77CA 10356 bytes
SHA-256: 0898a21be8db5cd69effb3978a9d7da5d88ee0d0e817bff9c1cfadd373f3fd66

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