Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad36427e476d48cb…

MALICIOUS

PDF

71.5 KB Created: 2020-11-16 19:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d55d5dab32c019c2333cc44d3cd739df SHA-1: 8616a3f71d8200cd3da8d9d103458ac7875c140e SHA-256: ad36427e476d48cb6322db3d0c53847008d49b28274644a1753c191b0708834d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is highly indicative of a phishing attempt. The ML classifier and ClamAV detection strongly support its malicious nature. The document body, though heavily obfuscated, appears to reference the car model mentioned in the URI, reinforcing the lure.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=2014+audi+s5+manual+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404285/normal_5f9d17829de03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382643/normal_5f9526f8bc2a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454290/normal_5fa1279567f92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_5f984f86e0b7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454544/normal_5fb03a5cda3b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403951/normal_5fa4e2b4637b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463794/normal_5fa23ae472a18.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/bejeseja/sonic_colors_iso_download_wii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60981d6d-c16e-48a2-8031-6e3c759f982f/gopro_hero_sessions_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb895f75-5584-477b-8f64-3473509035b6/887851189.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/bosquejos_biblicos_sobre_la_fe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de25902e-bd7b-449a-80b5-5f25b28ebb2b/vehicle_modification_station_fragments.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_off0000d9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BC 5496 bytes
SHA-256: 79e35b51a540db337cd1503f85ddcb85ae1a81762ebb01f04fb632ce95accd78
font_01_sfnt_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 10912 bytes
SHA-256: e2e3f30af5c3dc94759d1303a3969a9baf13bd28ea04187f70d4577ffa07f81e