Malicious PDF — malware analysis report

Static analysis result for SHA-256 481091104437cf51…

MALICIOUS

PDF

183.3 KB Created: 2021-04-14 07:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3e5705fdf46093e0f6bdbf7df1cfa111 SHA-1: 542c08f5d4a0ef1c334b278dab7c1d118375daea SHA-256: 481091104437cf5146f4256bcb7a65dc6653f2ffcb449a9d1cc373f183dc0109
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 0.9991

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://nipisod.ru/strik?utm_term=is+the+book+of+enoch+biblical PDF link annotation
    • http://bepudulumodover.iblogger.org/carboplatino_vademecum.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/hiashaj/microsoft_teams_download_location_android.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/4sgduhh/the_queen_s_racing_manager_porchie.pdfIn PDF document text
    • https://cdn.sqhk.co/fomolunuvufa/idHjigg/69127384252.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/25d44205-b46e-447d-aef7-7bf68e791678/is_there_a_dress_code_for_california_grill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/054fc181-bb6e-4782-974f-59603646cb9e/which_is_the_best_shark_corded_vacuum_cleaner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef26b9ba-0d9e-4349-ae90-96e03851cc37/kevukixuvezoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9157cf1f-0c4c-4262-9bf1-c8975d7269fa/biology_book_online_holt_mcdougal.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_19aba5f7abcb4cbbb28b88b07761efbd.pdf?index=trueIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_0f3ab3d617da422583c6630803f9b3aa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae32885-e520-4893-90cf-dbb7b0607ffe/science_squad_ultimate_crystal_growing_kit_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c6f8dce-3cdf-4f02-9abb-b64708fa50f8/83332941945.pdfIn PDF document text
    • http://vikarexazoz.rf.gd/77989031464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69d2e1de-0fde-4653-9f9d-49121879c8b1/what_kind_of_oil_does_a_subaru_pressure_washer_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54aa1c8-0a94-438c-bdeb-8fefd8f5d1b2/how_to_reset_iphone_5_without_passcode_or_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/238743d5-0189-4186-9cd8-c41c1bd2dcd7/5104084913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b3142c-47ac-4019-a783-44b79cfc45e6/26160856216.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off00024cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24CC6 21696 bytes
SHA-256: 5ee1eab5cab4b3f0240ee3b4df5cae8a55017dd1700410f65c18fa8e493498e5
font_01_sfnt_off00028779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28779 5016 bytes
SHA-256: d572973a00d6991d1ad4522e40da4cbb4d97d160fe1ff093c94b5dd29255b517
font_02_sfnt_off00029890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29890 18236 bytes
SHA-256: 46be184330716d1b0586ea51b07a6e888442b2ce76405b761be4a6068b5a0d93

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