Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00844d86e35e8e9…

MALICIOUS

PDF

67.2 KB Created: 2020-11-14 16:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a7a5beb3e4ee6d6c06b69b0db349f303 SHA-1: dbcaa3cc3bdd7727df855d7f8e0c0e3d10dbe21b SHA-256: f00844d86e35e8e94904a78ab3afa722bbfa4705a31bf5a806b6c82dfece40ce
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=ficha+acumulativa+del+estudiante In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5fa4f7b0ba1a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388596/normal_5fa8ba93bf568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403680/normal_5f9e335e84fce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369323/normal_5f8cc5d319136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_5fa3806cec58a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f92975f73240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414495/normal_5f95b6efaddb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5fa61c9a39900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f9813cbbc5c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5f8840038eb71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427799/normal_5fa300aba3e39.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/gopuze/camden_county_towns.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_off0000ca74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA74 5100 bytes
SHA-256: d006cbe2c878a5ba1262f2a530d841ad5f13863c74acd9ac0daa5cb76a537f6d
font_01_sfnt_off0000dbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAB 11104 bytes
SHA-256: 14633304b1d88ab4b6b506fccc013ed0760f309ba85fcfb9ab2a3210b5ed893b