Malicious PDF — malware analysis report

Static analysis result for SHA-256 8848f932d2472bd8…

MALICIOUS

PDF

70.7 KB Created: 2021-03-21 11:33:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7804b7ec971287e1501f50ed122ef0de SHA-1: 7858acc153006b5ed8b781edb46ddd8541f71c6a SHA-256: 8848f932d2472bd8e3923ba3d90d25435245e474ff409e52722680321cd605ae
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'active learning template nursing skill' to entice clicks on the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/123?utm_term=active+learning+template+nursing+skill
    • https://cdn-cms.f-static.net/uploads/4377679/normal_604015691d214.pdf
    • http://labincom-med.ru/kadhal_kavithai_movie_songstuqme.pdf
    • http://francobusiness.com/tolopepova6uqec.pdf
    • https://static.s123-cdn-static.com/uploads/4367000/normal_5fdd2ea4d4570.pdf
    • http://com-connexion.xyz/coloured_acrylic_sheets_near_melr3sd.pdf
    • http://wurilozi.scienceontheweb.net/93378749829.pdf
    • http://nigoguno.scienceontheweb.net/68882030444.pdf
    • https://static.s123-cdn-static.com/uploads/4470685/normal_5ff829fe3d481.pdf
    • http://lobutojumakix.22web.org/data_warehousing_fundamentals_by_paulraj_ponniah_solution_manual_free_download.pdf
    • http://heartcenteredequestrian.com/5255434307575dcj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://juxudawalugevop.epizy.com/new_testament_bible_reading_plan_in_3_months.pdf
    • https://s3.amazonaws.com/runuzitexokol/vatedufanagedezefizun.pdf
    • https://s3.amazonaws.com/tutasujal/63968129685.pdf
    • https://s3.amazonaws.com/vuterijoze/lithium_chloride_msds_sheet.pdf
    • https://s3.amazonaws.com/nokiva/65613888870.pdf
    • http://nomamazuzut.atwebpages.com/fofit.pdf
    • https://uploads.strikinglycdn.com/files/94a3581e-0d2d-487f-8363-20dffa9ecf28/kumedosopisofuruxode.pdf
    • https://s3.amazonaws.com/toniseligiwuzux/aashiqui_2_film_all_video_song.pdf
    • https://uploads.strikinglycdn.com/files/2eb09b9c-119f-49ea-8c23-492d1c885340/crafting_and_executing_strategy_thompson_download.pdf
    • https://uploads.strikinglycdn.com/files/749f95ba-dd2e-4a81-947f-a05dff8234ed/pepex.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7f4.bin
594ec058a2976e34ff45975b3fb16ff3b121f88df8ec43560f5214df7904a1a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F4 5368 bytes
font_01_sfnt_off0000ea25.bin
c838c85e2b81e27d8a1c0ba141c6bc6e938edc840020ddd12ee55ee618c8895e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 10264 bytes