Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c3ee9c10b1fdaa3…

MALICIOUS

PDF

32.6 KB Created: 2020-11-07 02:00:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9ec6eb40345d532b375c8d6ff8116cce SHA-1: dbe353e4cde435ea11b8a12cd091b5687fdb7b62 SHA-256: 4c3ee9c10b1fdaa3726701adaa82f4b551d12ff0188fbe6ffafc7793a7bbaea1
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, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of the malicious URL is a high-priority indicator. The document body contains obfuscated text and URLs, further supporting a malicious intent.

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://traffine.ru/aws?keyword=burndown+at+sundown In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5f93817c63b08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f87b68533d76.pdfIn PDF document text
    • https://kotonimurapuva.weebly.com/uploads/1/3/4/4/134440920/gunadufudamas_geliluzisaroke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5f9ef5b041a2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405202/normal_5f9fb8e3cef3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f95ca99286aa.pdfIn PDF document text
    • https://gijakumode.weebly.com/uploads/1/3/4/3/134306186/03360d5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f8a6ea2d197c.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/f1c278e6-6adb-4260-848e-a018a741b9c1/4418031316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2471b8c1-5046-4599-b0cd-593ddf652618/85495457992.pdfIn PDF document text
    • https://nogitolux.files.wordpress.com/2020/11/4785476884.pdfIn PDF document text
    • https://rupuxijod.files.wordpress.com/2020/11/53361749013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/113a9423-e3b6-437a-a871-524711369d34/61763024078.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_off0000441d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x441D 4928 bytes
SHA-256: 81b2c82ccc2226d67d6a47e4c4708bb85bafdef8dea09824c8ee7914542bf884
font_01_sfnt_off000054ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54FF 9668 bytes
SHA-256: 2abd680a0d96a237968035acbb7155e4b32dbc0393b3f5fbeef558ec4e608c7a