Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3337c12eaefaf8…

MALICIOUS

PDF

72.9 KB Created: 2020-12-04 12:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1f46c3b8d0c27a115eb3361e68a2fddc SHA-1: 06d88056b8f9b03dff53b73b76d4f7641a903f4c SHA-256: ad3337c12eaefaf8af2bb16dc008535dcea97108af4c425150c6ba22453dc9db
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the presence of an external URI and the overall detection suggest a phishing attempt to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=ncbi+genome+submission+guidelines PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370780/normal_5fc96c708479e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5f89094ce8cf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373008/normal_5fc77c4ca15b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f879bf9260f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465387/normal_5fc9cb98155df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/98d6c539-8b98-446f-b7d8-b49ab3fcc72c/78803497483.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/fobetepixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b181e996-3641-4075-a075-005c2383d051/98387025157.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/anatomy_and_physiology_of_breastfeeding_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/610cc163-b639-4fe5-bf57-26432a24960c/mijele.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/52003572880.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/17055260532.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/staff_attendance_sheet_excel_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39698db5-82f5-495e-874f-e15e5379ffad/88103676994.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/45674021765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0de7150c-a304-4ed7-a964-9f3272e7ec23/descargar_pokemon_mundo_misterioso_e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD413 4864 bytes
SHA-256: 7ab022a7860ace1bca099b20d9efc14d32bfdcb76ba1691cadd492864b038073
font_01_sfnt_off0000e477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE477 10416 bytes
SHA-256: 06029b9f98008d7a3c5df3b745e5502052b217d62195bae4659d400b9436de84
font_02_sfnt_off0001080d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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