Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6c4345000d00ae…

MALICIOUS

PDF

80.2 KB Created: 2021-03-25 06:51:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c238f284087b2560fa63842d927df7a9 SHA-1: 44ce5238e87424afd39a20239b4be328386516c4 SHA-256: ec6c4345000d00ae0161728cc56cec28755efa2a660b4166758b3a0d393eb574
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to educational content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/award?keyword=7th+grade+math+review+test+pdf PDF link annotation
    • https://cdn.sqhk.co/kusewupudin/widYgcr/block_breaker_3_unlimited_gameloft_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gitovera/1HU1ibW/takupawibuxunadajofekej.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/9e0dac8c-91d1-44fe-bd11-c57687b07780/24473251918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a41b0d-e192-457d-bca7-3ebb9f497b43/2003_polaris_scrambler_400_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903013d8-46f6-45c9-b3ef-4f0e951d4c1b/what_are_the_names_of_the_minor_greek_gods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8094dced-10f6-4a7f-9b99-f5d9a2803455/dobemoxaxumunovuzibogaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c9386c-0a76-4174-9f91-a9b850d76407/how_to_edit_a_scanned_image_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f9ffe4-4a14-49af-91f0-ecffcb8535c9/tenijir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b5ce1ab-6e9b-48a7-b460-ec2b4a2ecfb6/how_to_clean_the_utensils_tools_equipment_and_workplace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6979792-3c68-42b3-9bd2-baac697a1441/libaforitukenupix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8298c392-8967-4390-bf32-4979069f4aac/calculate_mean_median_mode_range_variance_standard_deviation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1deaff08-3065-4cf4-8c1f-26ecbbcaf13f/mopipajumoworekaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81e109d3-43cb-4b48-9403-791396a7baa0/whirlpool_conquest_refrigerator_parts_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c0af464-a047-4b6e-ae80-c34172b0a654/zevubebuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac571b4e-c12c-4206-8274-1337313356d5/madame_bovary_book_club_discussion_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/971a0cd7-9ef0-4ed1-949e-9897792367fd/85709458613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce616c87-6552-410c-9c79-bb98dc148ccc/29573786660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b4bae1-b872-4d2d-bf48-74364e1fd503/xinuzaluganederopabuboke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96478b8d-c6ea-4fd5-9dde-11b8c3bcd7e2/1017794463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/955d30de-6b58-4205-ad7a-60526947f73a/64072625232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ec29d9f-1252-46c7-9467-2f47d96a8a07/craftsman_yts3000_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/203f4424-23fd-4047-86d1-62f9bf3565f1/30987368069.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_off0000f9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B7 5560 bytes
SHA-256: 5b4aa9dd274da365e166167c366a83b7a6eb0b1277cbace133f844ad39f5250a
font_01_sfnt_off00010c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C90 11452 bytes
SHA-256: 8673f23f1d8593f966d983f1984b41c7200c5f4ea93a522a38f2be61abc276c9

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