Malicious PDF — malware analysis report

Static analysis result for SHA-256 b45640f16024c67a…

MALICIOUS

PDF

84.2 KB Created: 2020-11-25 06:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 59f8015a169e3251d7f5428b5b17aca5 SHA-1: 7b379bc7f264901e73b4d629c86227b0e44b50ac SHA-256: b45640f16024c67aafe2fd171e92f9dd0da1006dbbc11945a4707e4d71426f30
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs to a suspicious domain, likely intended for phishing or malware distribution. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Paul samwell-smith son'.

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
  • 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://trafffe.ru/strik?utm_term=paul+samwell-smith+son PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412388/normal_5f99b641a43a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381544/normal_5fbc64ee72bee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f8764c41f555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478131/normal_5fa6fcf334382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412999/normal_5fb51770cc72c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5e3fe2e-b30c-4a5c-9c19-d6f5dafbbd7b/in_cold_blood_study_guide_teachers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dade8890-df15-4edc-a072-ad1478da8597/89852881495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5f1f36-8345-421b-bf85-8ae4ecb7f24b/31757071311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e7c2df-ea11-4bef-bf95-c1a01023c007/car_amplifier_repair_shop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bbf8337-1763-4fd2-9934-3c4f5ad5f087/when_asia_was_the_world_free.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/3238911887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da536f2c-b070-404a-9421-ebaa5d1835f0/navajo_afghan_crochet_pattern_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4a5bd48-f067-4ea4-8361-076f50d06663/75079958508.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_off00010e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7E 4952 bytes
SHA-256: 2a28ffe59c53472f972a05562946f789f3fe1a8e45411a5f807d96977d48fabe
font_01_sfnt_off00011f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F49 10920 bytes
SHA-256: 0e1b5e2a7fbab62cf28f62feb47a051a6ae8dc03cb7cfd9dabfc947ab884d38c