Malicious PDF — malware analysis report

Static analysis result for SHA-256 66497f3ae40502e7…

MALICIOUS

PDF

72.7 KB Created: 2020-12-25 08:04:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f53f37fee2952396bd171ae23afcd454 SHA-1: 63c450186c5196210e9c22b7f8ed12a707ae4e44 SHA-256: 66497f3ae40502e73622cf7de2734778fbed8da87cc7d19c77a8709b9f3fd0b4
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'traffset.ru', which is likely used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'diversity and difference in practice', potentially to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffset.ru/123?utm_term=how+to+engage+diversity+and+difference+in+practice PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409425/normal_5fb36cefad0ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402244/normal_5f91426e5ecbc.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/vonugumazagusu.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/6f0a9bca-de9a-43c8-a41b-3e985d1ac732/pajojewasoxana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c9c629-cbda-4f0a-9553-265e18214e89/dr_viruch_in_apple_valley.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c4938e5-283c-44c6-af55-778997bc784d/vegozuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76449b34-1315-49de-bcae-626623ccbb54/gebaxukabizoxufixirapegup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71a16345-8746-4d42-aca3-84c7bab06236/jajofaxuzewames.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/71796014744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64379e32-9613-4e78-98ad-69e9db4f2d22/django_zu_alt_um_junge_Texte_zu_ste.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_off0000de53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE53 5504 bytes
SHA-256: aa821812b1d4b57b6a07a3c624943043c371dd5dc7ccffc9129c890314cd313b
font_01_sfnt_off0000f145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF145 10736 bytes
SHA-256: 783d4f4e17c7b787a6c4aa329c64488d204ac3ae3cdd700d5cbe79cea55e2e8c