Malicious PDF — malware analysis report

Static analysis result for SHA-256 38805214cedd3d67…

MALICIOUS

PDF

70.4 KB Created: 2021-02-16 12:41:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 98e5f443bde366e19500a2ecbe1b3c50 SHA-1: d2c2e22dd895356e3d05622314627cac7df7f2d5 SHA-256: 38805214cedd3d6758923a9aa625543381f1e6afc404f77b5f110cc144f0ad6b
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/123?utm_term=kirby+g4+vacuum+cleaner+bags In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459468/normal_60258d6f4f9ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450240/normal_6017359bcf478.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479213/normal_5ff0c879859ae.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/chb5lLI/dijepekaberopasuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_6018bd6d01b17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468823/normal_601710d0ecbab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495055/normal_6019fd747e8be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_6025275877263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425910/normal_602b832d1ca6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447263/normal_5ff758303170c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427274/normal_6023e752ea2a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C8 5476 bytes
SHA-256: 03a01991147d1af0c71fd3afd71b1fc70ad27f29c0336b6b3af337a8016495cf
font_01_sfnt_off0000e872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE872 10916 bytes
SHA-256: 63c159be64b56811d5daf7d0e28e3a65ff91ca3c1085e9862dd17685188353dc