Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a68f0576e74652…

MALICIOUS

PDF

74.7 KB Created: 2021-02-25 15:34:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ffb36a81daa3bf2a80e0cd27abbfb10e SHA-1: 2fa7320e6afc1eb354f66474d846fec7aeda5cce SHA-256: b4a68f0576e746527206dc6c103b9475a9aaf375b93b81684b8992802b4e0620
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to employee mental health, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/award?keyword=nyu+langone+employee+mental+health PDF link annotation
    • http://fisareboveda.getenjoyment.net/how_to_administer_the_ssi-4.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/ti_84_plus_ce_games_pokemon.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/troy_bilt_edger_tb554_wont_start.pdfIn PDF document text
    • http://leninuludobodu.mygamesonline.org/71374238625.pdfIn PDF document text
    • https://vatilevemuwaji.weebly.com/uploads/1/3/1/4/131453872/bivoxipitula_nasazanari_bujav.pdfIn PDF document text
    • http://vadudidubiv.iblogger.org/vishnu_bhagwan_ki_aarti.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/navy_blue_cooling_neck_gaiter.pdfIn PDF document text
    • https://gisogademumes.weebly.com/uploads/1/3/1/3/131379615/9591736.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/the_farlex_grammar_book_complete_english_grammar_rules.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/80309244575.pdfIn PDF document text
    • https://vedudogekikusiw.weebly.com/uploads/1/3/1/1/131164168/nubobuf.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/luropiw/blue_planet_world_biomes_webquest_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/miweledibofewebita.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/dewomoketorerizupo.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/14372992730.pdfIn PDF document text
    • http://wefexafunedex.epizy.com/grayling_mi_weather_snow_report.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/how_do_you_use_loreal_hicolor_blonde_for_dark_hair.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/tukureb.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/roduxovalezek.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_off0000e8dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DD 5028 bytes
SHA-256: 245197ef6d072ff55ee6270ffd71ec36ba5df7a137a61b6391f174b8dacd7d3e
font_01_sfnt_off0000f9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E6 10548 bytes
SHA-256: 86abd30606cce4db5201d682460ed40d5b17491e05b86535728457f29a46a88e

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