Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d3437504a60021…

MALICIOUS

PDF

107.8 KB Created: 2021-03-20 06:58:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7b800696f35b82841a86d76563fa785c SHA-1: 6c25f2620e81e5abdb58dbc2fe5ae74967ae8592 SHA-256: c8d3437504a60021b2c36d938145ba7c1dfd7b80b853a3505d77a1d75bc3553c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs the user to a suspicious domain, likely for phishing or malware distribution. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high probability of malicious intent. The document body, though heavily obfuscated, appears to reference a product manual, suggesting a social engineering lure.

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://soxebez.ru/wix?keyword=manual+mbox+pro PDF link annotation
    • http://idealslim-ordina.site/44346010808upj0k.pdfIn PDF document text
    • https://cdn.sqhk.co/fakomuse/dchpieK/judgement_or_judgment_ap_style.pdfIn PDF document text
    • http://electriccannoz.club/17545132904xh6rm.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/jqhfgci/gap_child_size_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/sc6jgEu/space_invaders_game_unblocked.pdfIn PDF document text
    • http://accueilcmb.com/how_much_is_a_badger_5_garbage_disposalnh2pw.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/subugapotevexov.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/wasosobigomexujafo.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/dzjfgib/doweziruligezosunewefuvof.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/23ad4dc6-3cfc-44d9-89d1-01d34f83fa64/what_is_total_quality_management_in_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa8da9d-83fe-4791-a34d-4c0856deb22a/will_there_be_any_more_throne_of_glass_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3837501-3839-4cf1-8db2-3d12af6e4169/zurupavimibezoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58aa4591-7484-4507-a586-a4426676ca5b/kodadume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/452be5ea-143e-4e1c-b966-edb3b827b222/whirlpool_lid_lock_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/922c6b51-3a84-4be8-842c-8a1cff600a29/the_missing_season_1_episode_3_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65fa8a78-4db2-4c85-b236-3a0189ca10e5/dbt_therapy_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45507f25-9ab3-4289-9ea6-0a5bb2a3d9d5/givevifedafopokemovaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39d1a7b7-9a55-4222-ab47-0a0409c5021a/siwebe.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_off00015cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CC4 4636 bytes
SHA-256: 3e92f155fac83ccb558d87a7ae8eb709455d422a7fada94088c1b7e55d2d5680
font_01_sfnt_off00016c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C57 11708 bytes
SHA-256: 9660a9a601d1279c107269f3286cc5f89099d66c7124beb84f5c278441f7c76a
font_02_sfnt_off0001926d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1926D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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