Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd598375e05d075…

MALICIOUS

PDF

79.2 KB Created: 2021-03-16 16:00:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cc25d162360add36ec0f9994cd89cdf SHA-1: 90be522469530e6556422abd483c4784dd6ccd4d SHA-256: 1cd598375e05d075e988f09cfa21b5a5d4fc59ef5efad669731b8bf3cdab35b9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a domain associated with malicious activity, likely to deliver a secondary payload or phish for credentials. The document body, though heavily obfuscated, suggests a lure related to an 'employee experience certificate'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/award?keyword=employee+experience+certificate+pdf
    • https://cdn.sqhk.co/biluvetizom/3hbihwK/witupuvefoberafunuwawed.pdf
    • https://cdn.sqhk.co/sexuzoropa/7WTZBUp/silajowatek.pdf
    • http://powerhdniy.space/98151646394qp9lw.pdf
    • http://mitedujonajezed.scienceontheweb.net/shark_euro_pro_sewing_machine_model_7133.pdf
    • https://cdn.sqhk.co/solaxutom/OgfyLij/tipo_de_estudio_descriptivo_cuantitativo.pdf
    • http://vkysnaya-eda.site/titus_andronicus_a_more_perfect_union_lyricsqvw4l.pdf
    • http://lnstagramverifiedsbadgesforms.com/mugajalivakuwekulozidrx116.pdf
    • http://pukujadud.getenjoyment.net/gadajajodigakak.pdf
    • http://justamorem.com/farorusitunitewakimovevoduf9k0.pdf
    • http://mebovaduzi.mywebcommunity.org/listado_de_adjetivos_en_ingles_y_espaol.pdf
    • http://norasuzajo.mywebcommunity.org/jabagekigapavuwinezi.pdf
    • http://politach.com/psychology_ciccarelli_5th_edition_answer_keye4a83.pdf
    • http://miribut.mywebcommunity.org/alesis_q25_driver_download.pdf
    • http://fuxanujibiz.mygamesonline.org/tex_jpg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xamapebonijos/dobutamine_davis_drug_guide.pdf
    • https://bd15da75-ee01-4ad3-8b22-4778d9929f37.filesusr.com/ugd/1abc29_04828335960943e0861c0cb2f06b54c4.pdf?index=true
    • https://s3.amazonaws.com/tixedujegibex/rees_howells_intercessor_book.pdf
    • http://jetotajasavesi.atwebpages.com/how_to_make_oracal_651_permanent.pdf
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_aef4ef8de09f4adaab9522dd04fe666a.pdf?index=true
    • https://s3.amazonaws.com/wetevali/nutritional_information_for_taco_bell_crunchy_taco.pdf
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_87d3fb7b14064ac8ad8908d00b6bbbee.pdf?index=true
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_c77aeca0e2094d6d8d60c73ee84f64f7.pdf?index=true
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_996cfbdac17a4d56a6a28067a44a5bcb.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec01.bin
eecb4cf950891d42f7056b3377c515a61fa7f20e01c776eb4fa449669b901519		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC01 4360 bytes
font_01_sfnt_off0000fb71.bin
6074ed6a12122928c548ae2b070d25d42d1e68ebd664c469dcb7b148379e0cdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB71 5252 bytes
font_02_sfnt_off00010d47.bin
8dc69a5d243d91ed99bbc202a690fd2fa5982aadb8500cb98f044dbb65060598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D47 9868 bytes

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