Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa9aaa62a981e0a…

MALICIOUS

PDF

77.3 KB Created: 2021-03-03 19:45:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6dc2ae88c7e1490764a04dfa9e120934 SHA-1: 2ee5a86667860cabdb45de4a071ac0e034527188 SHA-256: bfa9aaa62a981e0ab003f8bed0345d42dc5d8cfc59f7ed25050531be082e0d16
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a URL that masquerades as an educational resource, likely to trick users into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect users to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=photosynthesis+lesson+plan+middle+school+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474448/normal_5fc5e8ce55aed.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/N7vWjdd/lokeleguguretukep.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/5ANa8he/jbl_link_music_app.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/jkzeNjN/yellow_fins_hernando_ms.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/bfrjahj/descargar_counter_terrorist_2_gun_strike_hackeado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447884/normal_6034ce045a140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385853/normal_603e388327530.pdfIn PDF document text
    • https://cdn.sqhk.co/gevopobi/icFiajh/facts_about_earth_s_atmosphere.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/jgjdGoE/best_2020_albums_metacritic.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/tphBsgc/degumadozu.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/11329205289.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
    • https://s3.amazonaws.com/sinadi/25930015362.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/cpma_study_guide_free.pdfIn PDF document text
    • http://nozozuwovore.atwebpages.com/how_to_use_a_bushnell_telescope.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/how_do_i_pair_my_blueant_s4.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_off0000e543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE543 5192 bytes
SHA-256: f9696e6e5f0507c098afb7e74aef70f0aecc41c9c7b7528fe7cc282ddd367adc
font_01_sfnt_off0000f6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BE 10348 bytes
SHA-256: 04ca127061b49db6e2534021f3d7be292e1ce61e4752551518e7b619d57ad4ee
font_02_sfnt_off00011a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A10 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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