Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5ff1988d3958ec…

MALICIOUS

PDF

75.3 KB Created: 2021-03-27 15:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58a81c041db0b834c2bf2217bd1ea4c7 SHA-1: 7424bfea6d8e8266aad77906bc023b43e6544f54 SHA-256: 4d5ff1988d3958ec5e505138d720781537fedcbeb9264a7f77ff6bf9d2cacd37
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, suggesting it's intended to redirect the user to a malicious site. The document body, though heavily obfuscated, indicates a lure related to 'Practice of everyday life summary', likely a pretext for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=practice+of+everyday+life+summary
    • http://opit.space/simmons_sd5x_electronic_drum_set3gn8g.pdf
    • http://jepewadagamer.scienceontheweb.net/gapazerapufokifiw.pdf
    • https://jijoforupet.weebly.com/uploads/1/3/4/8/134864875/5092938.pdf
    • https://static.s123-cdn-static.com/uploads/4376878/normal_5fc686566b323.pdf
    • https://cdn-cms.f-static.net/uploads/4465908/normal_60184813e7733.pdf
    • http://repochka.site/gotoluwigolowi6acbk.pdf
    • https://riwurarelix.weebly.com/uploads/1/3/4/4/134484082/fawijutetuv-tejimamog.pdf
    • http://bilet-pdd.site/autocad_electrical_drawing_template91bwd.pdf
    • http://gojevomarokabe.getenjoyment.net/angina_postinfarto_2020.pdf
    • https://fejilezujew.weebly.com/uploads/1/3/4/3/134340931/kerakokun.pdf
    • http://sabovibin.medianewsonline.com/cvcv_words.pdf
    • https://rejurikin.weebly.com/uploads/1/3/1/0/131070637/gefamo-febaxeneboxu-gonerov.pdf
    • http://pozufopajosel.mypressonline.com/39236252625.pdf
    • http://bazis-rostov.com/22108794644sjuvk.pdf
    • https://cdn-cms.f-static.net/uploads/4489259/normal_60370f1256de7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/18eb334a-e3b4-4690-91e7-bd4b423f16f4/91321993039.pdf
    • https://uploads.strikinglycdn.com/files/3f675216-c0ee-446d-a2f6-55d4d1501495/34700504199.pdf
    • http://redifigikutusoj.myartsonline.com/vusuxenowoxugag.pdf
    • https://uploads.strikinglycdn.com/files/0703f71b-0b3a-461d-bd79-99a6e6e9a1d7/el_prncipe_maquiavelo_resumen_por_captulos.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_off0000e90f.bin
ec4e784774e10c6a7867a7faec475b7b6de4ba5c8083757735dd2529e0ea8aa1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE90F 5332 bytes
font_01_sfnt_off0000fb28.bin
4a961f8da0cc4d31aa84d1181dce1edb9b8758401338650a9288b1978ed6c6b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 10804 bytes