Malicious PDF — malware analysis report

Static analysis result for SHA-256 39612f05457a762f…

MALICIOUS

PDF

77.9 KB Created: 2021-02-15 22:34:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5a8c460e0433f36646f7529118ae1d3e SHA-1: e0e1a451aeca0f94d57e2eb642fe4c414dc12cf2 SHA-256: 39612f05457a762f0bc4bd43432b07accedcacd6cc84a540e4b6ed921b541ea1
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'maypoin.ru', which is likely the malicious destination. The document body, though heavily obfuscated, suggests a lure related to books, aligning with a phishing pretext.

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://maypoin.ru/strik?utm_term=more+books+like+the+secret+history PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470828/normal_5ff95ecd58484.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469358/normal_5fe2b5d735f0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389353/normal_5fe7b6724544e.pdfIn PDF document text
    • http://nekevofitoruzat.22web.org/67906860964.pdfIn PDF document text
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/2706096.pdfIn PDF document text
    • http://lunotikipadul.66ghz.com/badges_of_fury_dual_audio_480p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387817/normal_6025ab00dafc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424696/normal_5ff387ca2e1d6.pdfIn PDF document text
    • https://zokibiruxe.weebly.com/uploads/1/3/5/3/135326092/fapidik-jasusedinijix-sunaguzoziwepus-fasujonodonivi.pdfIn PDF document text
    • https://xebazasasixuj.weebly.com/uploads/1/3/4/6/134641459/4981893.pdfIn PDF document text
    • https://serarabasujuz.weebly.com/uploads/1/3/1/6/131606617/jubazikag_diwazevita_beporujawix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_5fea30956e452.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/kotenu/cardboard_formwork_tubes_bunnings.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/39774491033.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/hd_bengali_movie_site_for_pc.pdfIn PDF document text
    • http://tirejazanapo.epizy.com/dimensional_analysis_problems_conversion_factors_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/baldur_s_gate_2_character_guide.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_off0000f612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF612 4988 bytes
SHA-256: 60164c69e838b72fa94b01cf3dcd58877cfe3fb3751fcbab0b20b8a4e0acc549
font_01_sfnt_off0001071c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071C 10144 bytes
SHA-256: c6a3e8d3821c49a15dd7e63b9009d36dbc6f29269b72f6ec27f268c86c0da47c

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