Malicious PDF — malware analysis report

Static analysis result for SHA-256 88cb15bb751b6e8c…

MALICIOUS

PDF

84.9 KB Created: 2021-05-31 08:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d3154a34368247c8be9128e3f12289c6 SHA-1: e50acc6e365303ac5efa0ac62a52abe93bce317c SHA-256: 88cb15bb751b6e8c5c5ab08d36fa30ac396b86e5e2643b564d63683f9583e69d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=manual+maquina+de+costura+singer+start+1306 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422385/normal_600b9a955bbae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412891/normal_60146db06223c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496605/normal_5fc748091fe64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415326/normal_6012e1d091b7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389353/normal_5fe7b64ab47f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_604070aca811f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457868/normal_5ff7fe236b85c.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4379240/normal_60b2f22abca8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455370/normal_60600bcb79246.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393483/normal_5ffb24b6ad067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469105/normal_604d0786df959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_60381831452d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455639/normal_602e2fe5657e6.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/16699548-f8d7-4b58-a032-05ed0005575e/cuisinart_convection_toaster_oven_directions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e906d49-4983-4ce1-a1e2-37c2e867037f/wutukunojegej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56058afe-d3f2-4f2d-b4b3-54e187b57569/telecharger_kitab_kalila_wa_dimna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b04eaf-f7ed-4c2f-91f2-8efa2c7bb41c/how_to_change_update_time_on_dish_hopper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/323c0d6a-8087-458c-8e86-ec853930a432/purabunusamozokir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b4df6a-7845-4a4d-b4de-2c46ce07f80b/rozexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a70432-3ac8-4db4-a64d-b1f06eeed38c/ridazozopigugupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722f5b96-3a48-4b48-b10b-0df285901570/ritter_m11_ultraclave_parts.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_off0000fb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4C 2952 bytes
SHA-256: e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0
font_01_sfnt_off000105da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DA 5900 bytes
SHA-256: e3a9ab77d4981fa8baa3d39494a295a86effa4da9a8a8c977baabe70b4c55711
font_02_sfnt_off000119df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DF 12808 bytes
SHA-256: cff288e9363a25bda336f565914ad296bb9ec6404c35cffb1c460a2adbd01125

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