Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe1d69303553ecf…

MALICIOUS

PDF

79.6 KB Created: 2021-03-27 14:48:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bf7f6a178547f4f90afed50118713c83 SHA-1: f118ec9b88753a1ee54e1fdb7bf65b230cc47c11 SHA-256: 0fe1d69303553ecf242022c3d74d4ad14b8db58150971a6191e62f7c4c35f3d2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF that contains numerous embedded URLs pointing to disposable domains, indicating a link farm or phishing attempt. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent. The ClamAV detection further confirms this, identifying it as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, appears to be a lure related to 'project risk management lecture notes'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nipisod.ru/award?keyword=project+risk+management+lecture+notes+pdf PDF link annotation
    • http://b0xberry.online/midadunazijumamusomatav52vnl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478414/normal_5fe3aa493e012.pdfIn PDF document text
    • http://letxxnx.org/wifuteluwitogakokabazaralqs3wn.pdfIn PDF document text
    • http://matanusebatug.22web.org/85067076582.pdfIn PDF document text
    • http://wepijafiguwenan.mywebcommunity.org/how_to_use_chord_inversions_reddit.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/apc_be550g_ups.pdfIn PDF document text
    • http://albatros-trans.ru/juwijukurinubb4ltr.pdfIn PDF document text
    • http://sokfresh.fun/tom_clancy_rainbow_six_siege_ps4_single_player4qukt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5fe93544ec8b4.pdfIn PDF document text
    • http://nout-prodat.site/aladdin_movie_trailervs3et.pdfIn PDF document text
    • http://nunajurum.iblogger.org/nick_saban_the_process.pdfIn PDF document text
    • http://mysteps.online/41811444036ewung.pdfIn PDF document text
    • http://santecmb-sarl.com/prayers_to_thank_god_for_another_day26ku6.pdfIn PDF document text
    • http://fherixq.com/52233525079dt3t3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491451/normal_6037f0e698d94.pdfIn PDF document text
    • http://reduslimitalia.site/vofezixelh6dh.pdfIn PDF document text
    • http://jasubizajimalep.iblogger.org/83042277183.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
    • http://lolofekigosot.epizy.com/what_is_the_best_brand_of_heat_pump_nz.pdfIn PDF document text
    • http://xamipekuxedatif.rf.gd/84383511662.pdfIn PDF document text
    • http://wakinenuzubuvu.epizy.com/kujudisirizuvatitevosir.pdfIn PDF document text
    • http://fujebudavitasoz.epizy.com/bihar_si_question_paper.pdfIn PDF document text
    • http://bagurofodi.epizy.com/gopivejobamamelozawamijo.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_off0000ebe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE9 5496 bytes
SHA-256: 3f9a3491261311816988ba100adcf408d66c2051d8f4688676087e3713387fc2
font_01_sfnt_off0000fe84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE84 10748 bytes
SHA-256: 26c6d3d61595bec781e3119fded274f03e7480a699b679711465e251e324cd7a
font_02_sfnt_off00012303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12303 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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