Malicious PDF — malware analysis report

Static analysis result for SHA-256 235985e4aa4cd6c8…

MALICIOUS

PDF

70.3 KB Created: 2021-01-06 11:06:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: fdf9e0de4f58dbf9697d19d4928788f6 SHA-1: 3d7bb20d80fdae067bf3fe3c4d508f9a967d00da SHA-256: 235985e4aa4cd6c88aae2dc865502086a13c7b46678225a769213d58888a3d3c
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 users to a suspicious domain, likely as part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to reference the URL's search query, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/aws?utm_term=pokemon+nds+games+for+android PDF link annotation
    • https://cdn.sqhk.co/zubuwebofe/eXnijha/469848874.pdfIn PDF document text
    • https://sifukimoja.weebly.com/uploads/1/3/4/3/134357082/6128878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490725/normal_5fd92750e80ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383327/normal_5fc98e5146448.pdfIn PDF document text
    • https://joxisewegiwazev.weebly.com/uploads/1/3/4/6/134669132/xesaruf.pdfIn PDF document text
    • https://tifevijokob.weebly.com/uploads/1/3/5/3/135351552/zixeko.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/f7ifObV/7015264164.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/520c50aa-1720-42fa-bf38-612bd1f0aa85/11492778214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8172adb2-15c4-4ce0-b72f-f3248a0d0ced/best_twitch_extensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/812a0503-b337-471a-a395-2be2919fb443/whatsapp_messenger_business_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a1d8a94-7ae4-4da2-91fd-9637c2daf255/private_investigator_license_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f2d4d3a-d76f-4c50-8c5b-aae6dd27278f/bblia_trinitriana_o_que.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_off0000d679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD679 5260 bytes
SHA-256: 4174a71218b0712abdf99ac07032e9d022a719d45e0a4e82c8bc93dc02fc8273
font_01_sfnt_off0000e84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84C 10992 bytes
SHA-256: 82818b8959d79825d8c63cd1429503c6d78ba030b553940e4593b700a433c3bb