Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d7f12c28bcd27ce…

MALICIOUS

PDF

137.9 KB Created: 2021-03-26 10:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: fc588d9afeb328bcb752adba32d6afcf SHA-1: 274f95a33e2d556b519202c845ab0ac96f74a1dc SHA-256: 3d7f12c28bcd27cea94e3703093fea7afb746fbc884ed97033669a455620f905
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of an external URI and the overall classification point towards a social engineering attack, likely spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/award?keyword=pcr+definition+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415769/normal_5fe085792117b.pdfIn PDF document text
    • http://on24-system.club/wwe_raw_results_last_night_bleacher_reportso7mc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419423/normal_5ff9aa4622024.pdfIn PDF document text
    • http://fezelegafefuv.mywebcommunity.org/social_cognitive_theory_strengths_and_weaknesses.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_6000885f484ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405193/normal_5ff12bb45a57b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479462/normal_602fa9ec119f8.pdfIn PDF document text
    • http://avit0.cc/best_books_to_read_in_2020_for_self_improvementce5wo.pdfIn PDF document text
    • http://heartcenteredequestrian.com/best_shooters_of_all_time_ps494h3p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485450/normal_600be4251aa1d.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://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_e84202be5fb9494bb10de512c2f5eb23.pdf?index=trueIn PDF document text
    • http://fuguzametekobo.myartsonline.com/the_book_thief_movie_rating_uk.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/mapa_beograda_sa_ulicama.pdfIn PDF document text
    • https://590703a0-be71-4d3c-a49f-17767d5969ef.filesusr.com/ugd/656c20_749cf7c2202f40779b3ae5affa57ad44.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2291be10-9395-48b5-8b24-4b731c3029de/73315735583.pdfIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_dbb4c070da1a40e38afb313c24dedc26.pdf?index=trueIn PDF document text
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_327da1a9e5274764ba89644f131213f2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb5971d3-5c0d-4ae5-94a6-176e9c4e6454/principles_of_design_balance_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d95e0fc-fd4f-4a1f-a89b-2d6619d06faf/the_alienist_season_1_episode_3.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001beac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEAC 4516 bytes
SHA-256: beca2cc993e947beabc625a8aeccde04587017febb5d07236ad8c029666be6b2
font_01_sfnt_off0001ce0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE0A 13020 bytes
SHA-256: dc221cc59c39fbd5b617556268175e7fffe8acf4694e7d7938f4f66726e11ab3
font_02_sfnt_off0001f7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F7BB 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90
font_03_sfnt_off00020c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20C52 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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