Malicious PDF — malware analysis report

Static analysis result for SHA-256 377a990a7b7260ac…

MALICIOUS

PDF

153.0 KB Created: 2020-11-22 20:24:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d92ccb054b14930c6b00a9a0b94ad9f0 SHA-1: 6ec9554a1296d9ec0614f0aba60f540c40ab76c6 SHA-256: 377a990a7b7260ac2e5f96cd8cf0dac46a40f971fcf2af38cbe96695d45a8af6
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9986

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=civ+6+nubia+overpowered In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415783/normal_5f9f1afc29185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f88a313ecddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454171/normal_5fa7b21ceaa2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376600/normal_5f937d78c71ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425256/normal_5fa1e1fe01c04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5f8d6b79531c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404953/normal_5f9597ef402b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483610/normal_5fac06e8bb575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424007/normal_5fb6c1ed42dfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_5f9909bd554c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387424/normal_5fb9514d306ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451566/normal_5fa300bb2d12b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f903e4864539.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://uploads.strikinglycdn.com/files/d2d6f02b-c675-4fd3-b989-dd7202b10a29/juporonunijufoserixetezam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6a9a444-b9b6-4e2a-8ae8-31a22eff713e/mikipebekoxewadobonapewuj.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F6A9 5016 bytes
SHA-256: b53e949d3060d5d6b334769eebb1b001126cd69176a5ae05cabd0d7085b116b2
font_01_sfnt_off000207bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x207BD 11064 bytes
SHA-256: 745481179234b0488cc16f7bd353015f0de2d77174ebdc3a70958c481f5f71d1
font_02_sfnt_off00022cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22CEA 17760 bytes
SHA-256: 65ba1f8077e3aa0b282a0598851279ba9a1362d5efb7de28ce444c1a58445bac
font_03_sfnt_off0002479f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2479F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.