Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d800bedf5ddf309…

MALICIOUS

PDF

76.3 KB Created: 2021-03-19 09:20:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 643c774830bd64b9fa2e6e7c4d36724d SHA-1: 83cdb68e9c6e03f4e77261d1845977344dd5923e SHA-256: 8d800bedf5ddf3091c8021091815c737b261a8a86713c8d37580ced5fe1ecbc1
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating the presence of external URIs and embedded URLs, with a high ML score and ClamAV detection confirming maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'piano sheet music'. The primary malicious indicator is the redirection to the URL https://nipisod.ru/award, likely to download a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/award?keyword=gotta+go+my+own+way+piano+sheet+music+pdf PDF link annotation
    • http://autocredit.moscow/xosimanisavunebefalwk7t.pdfIn PDF document text
    • http://fredo.bike/best_car_for_city_driving_202075ggj.pdfIn PDF document text
    • http://timelessdecorum.com/charles_capps_ministry_videosnh7rd.pdfIn PDF document text
    • http://doridusa.medianewsonline.com/19742116251.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/encephalite_nmda.pdfIn PDF document text
    • http://dostafood.xyz/est_dirigido_na_factura_dos_direitoyhccg.pdfIn PDF document text
    • http://devicesprotectionforusers.site/nekenurile24ylr.pdfIn PDF document text
    • http://saudiautoinsurance.com/radorodixapugimqjyeg.pdfIn PDF document text
    • http://futup.ru/97250972078cwek0.pdfIn PDF document text
    • http://1xbets-reg.site/491043700785eb1g.pdfIn PDF document text
    • http://cosmicgig.com/persona_4_golden_100_guide_pciq53n.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/kegovev/19033905677.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/18465696618.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/microsoft_word_travel_guide_template.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/mathias_mhere_2019_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/election_reforms_in_india_essay_in_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/bounce_game_for_android_mobile.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_off0000eb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5F 5664 bytes
SHA-256: f96e67684def4272a40825b31dfa149bc1d32723cf383191b3b076cf6d80bca9
font_01_sfnt_off0000fea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA3 11216 bytes
SHA-256: 6a3030c634ee5812bc28a6fa406c678031def1ff8864c23786a80ffa136cec04