Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c8ab9051b2589d6…

MALICIOUS

PDF

70.3 KB Created: 2020-11-14 11:14:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cbb096a270b69a061df4bc57a57f513f SHA-1: 5bd7ea484f73cb78647801b0d370cc6b7cd78aa6 SHA-256: 6c8ab9051b2589d634625622f8238a3fde7abf6ed6c6fd2c400271a16e7c2424
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 0.9997

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://ggtraff.ru/aws?utm_term=halloween+history+worksheet+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f90e6ae83881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385435/normal_5f987dc2cfa53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446168/normal_5fade07d6b330.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382952/normal_5fad872d94ddd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414866/normal_5f94e35e749b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383128/normal_5f95c50839657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407100/normal_5f9e361dbbc2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452618/normal_5fa393fd27317.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/rimejiguvif/home_design_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/bdo_income_certificate_online_application_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e7f5d6-f1a2-45cf-adbb-7b4301669bf6/noruzenigek.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/fegine.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_off0000d5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BD 5348 bytes
SHA-256: 2a6b37c2349c2f852ea5e1ba903c84f11beac1fdd60817254f0d704d4a9d9ef6
font_01_sfnt_off0000e7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FE 10688 bytes
SHA-256: 63bb058594186e5a0ffde97849e020b84fd04f032925f901dcac30efdaa84a67