Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe4b6b31853b127…

MALICIOUS

PDF

93.9 KB Created: 2021-03-19 03:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 84a3008f26dee5ed374714640f8a7eb5 SHA-1: 6c18b6a6f4ae181dc161cf7b9ba70e453e035069 SHA-256: 3fe4b6b31853b127ea5e4c138160cb4b642cee61531be4f760662fd949ff168e
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an embedded URI pointing to 'golowaki.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of malicious activity, likely involving the redirection of users to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wb?keyword=against%20school%20john%20taylor%20gatto%20essay PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408997/normal_602513242c641.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425230/normal_5fc605b9caf65.pdfIn PDF document text
    • http://afracheat2.xyz/39874787707pt8tz.pdfIn PDF document text
    • http://rcasino.info/bishop_s_hatfield_sixth_form8auuq.pdfIn PDF document text
    • http://tufipenuvabiwed.iblogger.org/zilezilidoxoj.pdfIn PDF document text
    • https://cdn.sqhk.co/pabilere/bwnxjaw/6086208112.pdfIn PDF document text
    • http://iminn.ru/1534161522vt5bk.pdfIn PDF document text
    • http://fomaxos.22web.org/23649029438.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389586/normal_5ff0d26b57ab4.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/172061473267drq.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/how_can_hr_improve_employee_productivity.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/alter_ego_a2_plus_vk.pdfIn PDF document text
    • http://fbdirect.site/thomas_sowell_economia_basica181un.pdfIn PDF document text
    • https://cdn.sqhk.co/basunemavut/aggjgCN/55682822217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_600a423175047.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/rizezobabub/icivics_one_big_party_worksheet_answers.pdfIn PDF document text
    • http://nazonuretowu.epizy.com/20582838710.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/basic_guitar_chords_for_beginners_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/91288738123.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/to_kill_a_mockingbird_character_worksheet_answers.pdfIn PDF document text
    • http://momoxorepuvo.epizy.com/como_agua_para_chocolate_pelicula_online_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/tuderisulepeluwatadarol.pdfIn PDF document text
    • http://dipagepe.atwebpages.com/assessable_spouse_election_form.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_off000133b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133B0 5228 bytes
SHA-256: 748bce2078e3700f05466291db4239a34333e1c07c3c8bdbd8b6b28bf1fea526
font_01_sfnt_off00014585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14585 10704 bytes
SHA-256: 5061265c474c664f583fd66d80cb1eb3481ffed4f532536bcb33d52f18aef28d

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