Malicious PDF — malware analysis report

Static analysis result for SHA-256 85396aabf09a7093…

MALICIOUS

PDF

45.2 KB Created: 2020-11-08 05:10:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6a0806656e384752b21086e7bc389a31 SHA-1: 072176b66a8efb7fcf640055e03b07e30e5d6424 SHA-256: 85396aabf09a70937ead4f04ea1e3afd1d57e019a62170964e02706717baa369
124 Risk Score

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=aukey+dash+cam+review In PDF document text
    • https://duxixujojive.weebly.com/uploads/1/3/0/7/130739103/ab2e15b7993d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fizup/valentine_one_radar_detector_user_manual.pdfIn PDF document text
    • https://najoluni.files.wordpress.com/2020/11/31691738979.pdfIn PDF document text
    • https://padapifizi.files.wordpress.com/2020/11/61636937237.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdfIn PDF document text
    • https://xozolow.files.wordpress.com/2020/11/circuit_wizard_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/609d21c6-1992-4a03-8405-9d2a449fe91e/zafasebiwelukazaraxut.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/88721088615.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/21969992150.pdfIn PDF document text
    • https://wumevom.files.wordpress.com/2020/11/viburijoxutiwalup.pdfIn PDF document text
    • https://kajebevomota.files.wordpress.com/2020/11/69565217032.pdfIn PDF document text
    • https://mogefemo.files.wordpress.com/2020/11/nukefexevefa.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_off00006494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6494 5040 bytes
SHA-256: d2824f43accec6a9b01ce3f5cbd32d2f857ef08812e09b7e67e17b5cab4a6f6d
font_01_sfnt_off000075c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C5 10188 bytes
SHA-256: 152e5a12f2161f99dd1b4140b92614a45dcda4e6ab93eef5b50682b4f8455715
font_02_sfnt_off000098a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e