Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f30d3c52b257a3…

MALICIOUS

PDF

66.9 KB Created: 2021-03-31 02:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2ed408764ec193afbb598abe1c656730 SHA-1: b5dd19493d5254bf90b1a30d12008757dd2c392d SHA-256: a2f30d3c52b257a361ed4808216660d6a62eef618dda38cb413c9d0a5c3cc136
96 Risk Score

Malware Insights

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

The file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'resalured.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to career paths, consistent with phishing tactics.

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://resalured.ru/award?keyword=career+paths+computing+express+publishing+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481400/normal_5fceda3027d8e.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/el_vendedor_ms_grande_del_mundo_resumen_por_captulos.pdfIn PDF document text
    • http://medicinfo.online/in_a_dark_dark_wood_movie_2020nuvpa.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/gTjdjbx/zabikusuzutogiliki.pdfIn PDF document text
    • http://femonejigajape.mywebcommunity.org/dupajas.pdfIn PDF document text
    • http://basvuruizleme.online/garmin_astro_220_for_sale_australiatpx5a.pdfIn PDF document text
    • http://agentsecure.space/lepuzukuzov38lrf.pdfIn PDF document text
    • https://cdn.sqhk.co/bawijodol/iw5id3D/digital_tasbeeh_counter_app.pdfIn PDF document text
    • http://potozafit.medianewsonline.com/77128393638.pdfIn PDF document text
    • http://mikazuxo.mypressonline.com/aprender_coreano_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_605b74c5f3650.pdfIn PDF document text
    • http://rawenspant.online/24727969542pv6n.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/bezorito/92410237480.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/devesowiwajowinutikepi.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/ffx_aeon_stats_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/xobipil.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_off0000c52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC52D 5684 bytes
SHA-256: 0ce52cfab1814c81cb67ae25bcc6c535696658693e475fd9f8d8a069a9646625
font_01_sfnt_off0000d853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD853 11492 bytes
SHA-256: d4b0c7495f910d4cf34794b5e1b5794f42c4e6411c06abe1c2783d619aba044f