Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e649f18054d85f1…

MALICIOUS

PDF

77.1 KB Created: 2021-03-25 16:13:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 86ce4f426653bc6f686d315539cfde50 SHA-1: 0daf228cf10eadca468122eb1b6082607df991f4 SHA-256: 9e649f18054d85f15a735f6686f57f23e66bf95ec30a63119492d913ab8b8d9c
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://baarspo.ru/wix?keyword=national+history+bee+study+guide', which is likely the primary distribution point for the malicious payload. The document body, though heavily obfuscated, suggests a lure related to a 'national history bee study guide'.

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://baarspo.ru/wix?keyword=national+history+bee+study+guide PDF link annotation
    • https://cdn.sqhk.co/bebumila/ehdjfhj/carry_speed_pro_mark_iii_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/vjdihUd/top_up_genshin_impact.pdfIn PDF document text
    • http://nuzalozipofeven.22web.org/logupifobogiwo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451350/normal_5feaf0df56b93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496602/normal_60072a8fa194d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392869/normal_5fe4b78746e13.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/vgyhfib/fruit_rabbit_bubble_gum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_6023b955adca8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417138/normal_5ff9140cddb9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450337/normal_6001fdc0e7eec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450628/normal_5ffe574f9b0ba.pdfIn PDF document text
    • http://xiwasaruv.66ghz.com/competitiveness_report_2018_wef.pdfIn PDF document text
    • https://cdn.sqhk.co/joxezexukub/bKicicp/hundred_years_war_history_podcast.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dijuvunote.onlinewebshop.net/abdomen_agudo_ginecologico_2020.pdfIn PDF document text
    • http://numakuzugurewi.rf.gd/21313965384.pdfIn PDF document text
    • http://bedipate.epizy.com/aerogeneradores_de_eje_horizontal.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/how_to_write_a_tv_news_report_example.pdfIn PDF document text
    • http://natukifuza.atwebpages.com/oxford_bookworms_library_stage_2_the_piano.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_off0000f14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14E 5296 bytes
SHA-256: 28d570c7e16c7d437cbbe221c5d6412925091663975db712c00d88a7cba90471
font_01_sfnt_off00010351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10351 10616 bytes
SHA-256: c5ac4f9deac6f4f1cadca5acbc3e9343f2c9e8b19047b941c2bad01e3df6e0c1

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