Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dac045c95185601…

MALICIOUS

PDF

66.7 KB Created: 2021-02-07 23:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 07fecb854a220fe8bd2602ca990cdce0 SHA-1: c8b3d601ceff72cf34da28b3fd1f1979a1a7ed9b SHA-256: 3dac045c95185601f38b8d163ab4a04aa6db4926758c64c0e78b0848dedac8e9
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs pointing to various domains, many of which are hosted on disposable or link-farm-like structures. The document body, though heavily obfuscated, suggests a lure related to 'Bellerose light 1.0 font', likely a pretext to direct users to these malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wb?keyword=bellerose%20light%201.%200%20font PDF link annotation
    • http://bahis-sikayet.com/las_lenguas_romancessqrf5.pdfIn PDF document text
    • http://golden-bridge.pro/buponowesfzfv9.pdfIn PDF document text
    • https://jonewaxuge.weebly.com/uploads/1/3/5/3/135319919/texine-tibar-vonibuxagam.pdfIn PDF document text
    • http://merishwheelrecords.com/dfl_pretest_answersalhmu.pdfIn PDF document text
    • https://rilubaka.weebly.com/uploads/1/3/5/3/135303332/jedowebidi_gexabuzosofo.pdfIn PDF document text
    • http://timecodes.net/bouncy_ball_with_no_borax17v26.pdfIn PDF document text
    • https://losiweso.weebly.com/uploads/1/3/1/3/131380476/vatukiramisadope.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/cl02jfH/78624618209.pdfIn PDF document text
    • http://helpforteam.com/girl_voice_changer_during_call_app_downloadguyc9.pdfIn PDF document text
    • http://sbrf.link/moberelufofge4lp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tizerusop.rf.gd/puturesunugejujuxegasari.pdfIn PDF document text
    • http://fepaseweg.epizy.com/vafakomusanedodob.pdfIn PDF document text
    • http://nonakiwobituk.rf.gd/ipcc_special_report_on_land_use.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_off0000c2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2CA 5092 bytes
SHA-256: 5bdf983c55d4288b44519d18e514624e97aedcfb29a8dfcafab7c7c940ae226c
font_01_sfnt_off0000d42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42A 13528 bytes
SHA-256: da2f77833c8f9a62d84266803b456390b6b44ed059c2edf58f1836c0da5941f3

Open this report in the interactive analyzer, or submit your own file for analysis.