Malicious PDF — malware analysis report

Static analysis result for SHA-256 903958d52eb7eb97…

MALICIOUS

PDF

80.5 KB Created: 2021-03-31 10:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5c07aaafed3077cfa7114382f429e98e SHA-1: 0609bedad4c85e2f5c5a04c4890b71d984e452be SHA-256: 903958d52eb7eb97261fd478704bfb3296860dc76e61b95ccf91b5fddb304360
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, identified by heuristics as an external URI and flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to IELTS British Council materials. The presence of an external URI and the ML classifier's high confidence score indicate a malicious intent to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/award?keyword=ielts+british+council+practice+material+pdf PDF link annotation
    • http://poxumanavofeboz.scienceontheweb.net/successful_coaching_4th_edition_online.pdfIn PDF document text
    • http://fajamad.mypressonline.com/sabimokivesenikumadi.pdfIn PDF document text
    • http://jefijunanupe.sportsontheweb.net/gufagoxepudilu.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/87091511820.pdfIn PDF document text
    • http://negedibomul.sportsontheweb.net/sodastream_one_touch_white_big_w.pdfIn PDF document text
    • http://mimivamefigupe.sportsontheweb.net/2020_calendar_free_printable.pdfIn PDF document text
    • http://viwafuxofiseko.getenjoyment.net/how_to_calculate_3_to_2_ratio.pdfIn PDF document text
    • http://pirewarekow.mywebcommunity.org/ayurvedam_tips_in_telugu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/afcaa7de-b4b5-4596-88a5-19eb6c9123bb/mabudana.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/descargar_gratis_el_libro_cul_camino_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/tikabepo.pdfIn PDF document text
    • http://solugivewatewa.myartsonline.com/lifozafefewavoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a827d6ed-0055-4bb7-9de5-8207ae7f864d/how_to_crochet_waffle_stitch_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04a9f697-a5a8-4740-9d62-67e253eef79c/the_true_measurement_of_a_man.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/22528922957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6978184c-0fde-4bee-bd96-e9291d48a09e/jabigibuwenafevimerupubet.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/how_to_do_agile_development.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/cambridge_advanced_learner_s_dictionary_paid_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b427f2-bbd7-4851-817a-d280bd15481c/xarojazopamivapumisitul.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/online_books_free_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/wezibobatusuximitelavigom.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/android_button_set_background_color_and_image.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/mio_pony_fly_sheet.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_off0000f82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82E 5472 bytes
SHA-256: 5a366c7521c29b0ef6bf5be12ab528b22f00d3f19d42c6360a477345e3a729a5
font_01_sfnt_off00010a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A94 13016 bytes
SHA-256: 4d18c502a4211b6b0262ba5478088bf11c0245c5368787fabc8d9c2f49b9a398

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