Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d63e77f9349c46…

MALICIOUS

PDF

72.6 KB Created: 2021-05-26 05:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 833ef15c88ef511a9f6836452c2eebd7 SHA-1: 0cf63cc6c2e4bb9bdfd1b30b78107092bf906ac6 SHA-256: e5d63e77f9349c46cda7226c9224dc5eebcec4ab9fe83bd42084a02f00493d75
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'Unit circle filled in pdf'.

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://ponafet.ru/strik?utm_term=unit+circle+filled+in+pdf PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c632ad3-a123-4285-a91f-158147ed1cb5/wumulujumirefobegagupup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aabe47cb-b25e-4a67-9839-5edd94736e95/99118666071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6fdae48-9005-4763-a97a-2a7fe62645cf/movegawunawokoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56a2ca27-2a3c-4b1a-b265-5dd4a36bfe31/fosenekiked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c3ba727-74a5-444e-982b-1724aef0d406/e46_transmission_oil_capacity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3d46d2c-29e6-4934-9cde-eee4cff5f75c/vijewizadevagerin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e163436c-95fa-4a29-9169-f128c939ac91/g_shock_g_7900_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/278486cc-834b-4f74-a573-3f16a7b26cd6/learning_teaching_jim_scrivener_second_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3873e082-fec7-4674-9d82-009f2c0d2600/bifutorokewejasewamomadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f61d0f55-d900-40cd-a003-a170cb6cad3d/9111426117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d1a52ca-ed48-4301-b9f9-0b197796d094/elder_scrolls_online_assassin_build_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/859da7ed-2a5c-406f-9b14-890591f7eadf/81994233795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ba7af0-9175-437c-acbd-cfa5dd5017b9/toxitigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cf0b375-3192-499c-b762-2c084b942600/pukejanop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de062ca-f193-4fcc-ae6e-8b44213d7d18/traductor_ingles_espaol_audio_pronunciacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6149f8f7-a92e-4029-9aeb-6d7e097fa436/toddler_bible_stories_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3efc49c-9412-419d-9c63-bda7b901dfda/how_to_open_tux_paint_in_fullscreen_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2756d5f-1f0c-44f6-b479-57c513269c88/livros_espiritas_romance_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3728d4b8-b23f-40ff-ba6e-496c50425b0e/why_is_it_called_supranuclear_palsy.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_off0000e007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE007 4752 bytes
SHA-256: f018e50e2f9e2613a3315e00db8118a76fe104694bf74bdbc1ae75a71101f29c
font_01_sfnt_off0000f049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF049 10892 bytes
SHA-256: 39bde8dc453666c79cf2a09df5db1c1a26992e8f55ccff8f7090ce2fee5e7d68

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