Malicious PDF — malware analysis report

Static analysis result for SHA-256 de43cebbd84e319f…

MALICIOUS

PDF

82.7 KB Created: 2021-03-27 12:09:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d123db0c4bf518b70b521ddc8b67ce38 SHA-1: 46cd79767a406d85b4eb0071b3ccb41597d62577 SHA-256: de43cebbd84e319f23844c29c69331afa935231e1437ca4c8f92d31a1ff6b61b
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 URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to PDF readers and a URL that appears to be a lure.

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://resalured.ru/award?keyword=best+lightweight+pdf+reader+for+android PDF link annotation
    • https://cdn.sqhk.co/rarinuva/eiemaii/brain_test_game_answers_level_119.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/gijQiih/xarabewapifefasutotu.pdfIn PDF document text
    • http://dom-bita.org/15586887112003n2.pdfIn PDF document text
    • https://cdn.sqhk.co/fokofike/cgghiia/94973136662.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/gehhYia/carx_drift_racing_2_download_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/lemisobe/PhaiawZ/wawamudususexak.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/cVY32xp/pexanu.pdfIn PDF document text
    • https://cdn.sqhk.co/kagitenoru/iLjdWLe/children_s_christian_songs_video_youtube.pdfIn PDF document text
    • http://llloooodddd.space/450581057459ciwr.pdfIn PDF document text
    • http://neyroskakalka.site/what_is_ray_bradbury_best_known_forvo2vr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/widuxade/74735587935.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/xekolop.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/canvas_student_app_for_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f611f96f-4c6d-4f71-b430-9cbd96627f6e/personajes_principales_de_el_sueo_de_una_noche_de_verano.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/how_to_adjust_strap_casio_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/nc_driver_license_test_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/84942337265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fabafccb-9462-4a5f-b54f-6d1e6b09e033/best_diet_for_losing_weight_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/57205860024.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/76524736584.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 5232 bytes
SHA-256: 82e94446acd51769f13836a95e2a45419528987283efeb478a2b1dac46c6bad1
font_01_sfnt_off00010ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC1 10688 bytes
SHA-256: a14daa6ec99bf3f7019a9a1c10baa003623bfc806e3680dd9e4388321a1dda76
font_02_sfnt_off00012f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F53 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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