Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cef7f9e1b2db21d…

MALICIOUS

PDF

67.4 KB Created: 2020-11-24 00:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 31c70f3aab0b9aa4e5546f5f036b852f SHA-1: 92ba8f8325b1ce541f01138e1e0a71c278021eec SHA-256: 4cef7f9e1b2db21d5185b2d8750981bf5fe984f2092844d614b5253161865bfe
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely used for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=learnenglishfeelgood.com+esl+worksheets+passive+voice PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423732/normal_5fa06d514e8c5.pdfIn PDF document text
    • https://fadojoxenan.weebly.com/uploads/1/3/4/6/134666181/lamadikaxite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_5fa4a787d0f28.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/zomelijorokemumawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378846/normal_5fa6699617885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416660/normal_5fa674ae10d1c.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/bulujono/beberoko.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/participatory_approach_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc9ccdf-75d0-4b5c-b43f-53be7a1c9a3f/2893340398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e2ecfc-68e5-479e-bf39-fbc02e3984bc/pokemon_pokedex_toy.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/mugutami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7188a558-cf09-476a-ae2b-ae7d17fcaa7f/48150874714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c4401fd-9f45-4126-bff0-0cbb2d9cd053/diwobulusikixafosatujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a99990-bae5-4cb3-a4e6-129e221891cc/90737733349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d13a105a-e2bc-4dd4-9c43-86a6dc205274/71181704838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17722595-c7b9-4e5f-b9af-feb120d80ee5/tafejedomejavi.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_off0000c8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A8 5756 bytes
SHA-256: 13f1ffca839d7300cab096470ac4a094ca418cd0f3379f6040fadebe655f399e
font_01_sfnt_off0000dc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC38 10748 bytes
SHA-256: 5f8f6b89c5bed02472cc1cd7f551a6b9320927d49d5c77db72a14e02c7264bf0

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