Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a4751044b47e08…

MALICIOUS

PDF

73.7 KB Created: 2021-02-01 07:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a126e8b9bce74022946337a3823f703c SHA-1: 023a7d20a8becc495e2d5a83c59c6b540b232e1d SHA-256: 13a4751044b47e084642d13e3366c8d462b3809e7f63af34dcc02845f170c344
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, 'druttle.ru', which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site.

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://druttle.ru/123?utm_term=merit+badge+university+2020+near+me PDF link annotation
    • http://micrometerdigital.xyz/43409971238n13ke.pdfIn PDF document text
    • https://gafewifem.weebly.com/uploads/1/3/1/3/131379815/1b1a82e.pdfIn PDF document text
    • https://cdn.sqhk.co/salefudodid/wwn21gi/nanenebiveponexojemiru.pdfIn PDF document text
    • http://jefozogez.66ghz.com/bootstrap_4_template_admin.pdfIn PDF document text
    • https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/505227.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/gLsXbhj/inside_out_2005_full_movie.pdfIn PDF document text
    • http://lowazaz.22web.org/jolakuzajoxak.pdfIn PDF document text
    • http://vepapin.iblogger.org/chipotle_fax_order_form_zanesville_ohio.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/hiHhdji/best_video_maker_app_for_android_free.pdfIn PDF document text
    • http://masterpowerpoint.com/cartoon_video_app_store_download0nx48.pdfIn PDF document text
    • https://cdn.sqhk.co/kavejufa/cidjaRH/rolling_stones_gimme_shelter_movie_trailer.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/pizexopenaxu/guide_du_routard_israel_jerusalem.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/77394557613.pdfIn PDF document text
    • http://verejepaw.epizy.com/56816288319.pdfIn PDF document text
    • http://lenumizisil.rf.gd/android_network_player_4k_tv_box.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/kekuxomopapuna.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/mathematics_grade_7.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_off0000e0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FD 5692 bytes
SHA-256: 68fe3d86b1b483ca851c76752317d66bb95ce6a514672917660c286cf8d13225
font_01_sfnt_off0000f45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45F 11000 bytes
SHA-256: c1b30ad5716bf3a1917223c9167fbe478acd31546844c5cda549beb4bad184a9

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