Malicious PDF — malware analysis report

Static analysis result for SHA-256 4185d67471682170…

MALICIOUS

PDF

69.9 KB Created: 2020-12-16 02:58:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 68fc658282b5c5431c90ccf6a451008f SHA-1: 723c3ab8095f28bd1b672b381ff6162f9fa1a757 SHA-256: 4185d67471682170a188117f4df7fb76599f85e0aa432c695c60ff0e430d2b91
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific 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://trafficel.ru/123?utm_term=ha+jin+saboteur+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403819/normal_5f9dbae29efaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404955/normal_5fafa91f88669.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457563/normal_5fa69dd2a4073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5fb3da427c747.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f8727fb79912.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/9b180e79-6307-4d46-a756-e8b1e8904e61/76868305037.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/ireport_plugin_for_netbeans_8._0._2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f284791d-7428-4abc-94d3-e0e30c025d9a/52055278737.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d9e660f2895dc109c93a/t/5fc88c14b74dd54858dbe97f/1606978584115/85053649757.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c87788c99b6d37a67a80/t/5fc2372b5147b148047c7df4/1606563636212/84725251205.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/ffxi_steal_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d92c83-78c1-409e-af32-b9659bd43d66/types_of_circuits_and_ohms_law_worksheet_answer_key.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_off0000d640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD640 5180 bytes
SHA-256: 2fe068288362653e183e6f6e1a2e55be7471202b7fa14e039f2078ac6b438389
font_01_sfnt_off0000e7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E6 10404 bytes
SHA-256: 7914442efdcf9fc2f289be16646226ca1a05b1aca010ff5658f645edfecf8b7c

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