Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4559db7a61d7bc7…

MALICIOUS

PDF

76.2 KB Created: 2021-02-24 16:10:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: eff600a359c5aa2520eac7e4e83b0d68 SHA-1: 96a4355558fd24af1c79c3990d1aa8948e7dff5a SHA-256: d4559db7a61d7bc7ed7be04c2cd4990f7a4391411419f8db6fa0b59ec2638b0f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a link to a suspicious URL, identified by the heuristic PDF_URI. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be related to the URL's query parameter, suggesting a phishing or 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://jacksth.ru/strik?utm_term=person+who+can%2527t+stop+hiccupping PDF link annotation
    • http://vifofumimugeke.22web.org/56143133184.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421768/normal_5fc9235c74a5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ninasivol/xitezudupajidinavuka.pdfIn PDF document text
    • http://paguvano.epizy.com/baroque_music_period.pdfIn PDF document text
    • http://larukanogut.epizy.com/vemibutavuvew.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/kidatinudegedegulim.pdfIn PDF document text
    • http://sufutogikid.rf.gd/ps_vita_2_2020_release_date.pdfIn PDF document text
    • http://sinipuxi.epizy.com/tufomejogefurulasar.pdfIn PDF document text
    • http://wubexemetaxoru.epizy.com/the_casino_job_full_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/anaphylaxis_guideline_thai_2017.pdfIn PDF document text
    • http://vunowobaxab.epizy.com/diseo_de_un_elevador_de_cangilones.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/guide_to_fill_express_entry_profile.pdfIn PDF document text
    • http://bigofufujenu.epizy.com/styx_come_sail_away_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/alto_s_odyssey_game.pdfIn PDF document text
    • http://fibubaxuvuvixik.epizy.com/99405883231.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/vsco_cam_full_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/riwonefutebumekaramo.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_off0000ed1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1F 5288 bytes
SHA-256: f3d272788a54cfd84a59397efbcedf0bf92c2fd9e442aaec7eba9c67ac32b87c
font_01_sfnt_off0000ff32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF32 10612 bytes
SHA-256: 9be2984dd559d26d596e31e151dda3adb94eccdd75f07d5c073837a96451fa60

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