Malicious PDF — malware analysis report

Static analysis result for SHA-256 558fd368ba9293f4…

MALICIOUS

PDF

216.7 KB Created: 2020-12-02 18:36:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 733d8931e8e3f12af4d176423dd80c2a SHA-1: 531505f12b8ce8361cf3bb7f8fbe2864e78c94d8 SHA-256: 558fd368ba9293f41d0b317a446754e5c2350b59cfdab88ff95f88e6945c9066
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, indicating a phishing attempt to redirect users to a malicious website. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure suggest an attempt to exploit users through a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://trafftec.ru/123?utm_term=temple+of+god+kjv PDF link annotation
    • https://kawewadibuporak.weebly.com/uploads/1/3/4/3/134371142/nexexe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465386/normal_5fb2a126dc78c.pdfIn PDF document text
    • https://buwutele.weebly.com/uploads/1/3/4/4/134450545/zonidovofovujut.pdfIn PDF document text
    • https://pozuzedik.weebly.com/uploads/1/3/4/6/134668333/4284959.pdfIn PDF document text
    • https://pitiwiju.weebly.com/uploads/1/3/4/6/134687602/gobizu.pdfIn PDF document text
    • https://lupogupep.weebly.com/uploads/1/3/4/4/134444844/diberatonudibud.pdfIn PDF document text
    • https://zemodeviwiteg.weebly.com/uploads/1/3/4/3/134351550/3261110.pdfIn PDF document text
    • https://sonefuvik.weebly.com/uploads/1/3/4/3/134325549/gefulexezo.pdfIn PDF document text
    • https://motadali.weebly.com/uploads/1/3/4/3/134368257/kaguxulogo.pdfIn PDF document text
    • https://jarofudi.weebly.com/uploads/1/3/1/4/131408364/1701900.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc106a17848ba205d193829/t/5fc53b5f7acac6192a6c07f2/1606761315141/providence_hospital_everett_colby_campus_address.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f171c14dfd36fef1b44e/t/5fc6d4d92ac13f1ee9a86e2c/1606866137719/test_de_gacha_clubs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee4fe6d49a06bb56056f/1606282832175/fenufivaxabibanajuneta.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_off00031ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31ED1 5024 bytes
SHA-256: 1fa60ebad3f9d537d8f5c3becf78b5d4fdd7f0e6ae6d1c7b03ee4fb55136cec3
font_01_sfnt_off00032ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32FF2 11000 bytes
SHA-256: 998681ca944638c80090af7f20c5281e3fbc645ae5503a76405d7b5acbcf5684