Malicious PDF — malware analysis report

Static analysis result for SHA-256 d51bcfc03d733536…

MALICIOUS

PDF

68.4 KB Created: 2021-02-18 13:46:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 487208979435d43a1ad8fe7f73b284e0 SHA-1: 9543ade999adf967ba5090b176221352f589888b SHA-256: d51bcfc03d7335361ce41dcc214998597e163aeb2e2348a4526cd6ed35c35b85
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=data+science+internship+london+2021 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375507/normal_5ff3f9313ec9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412575/normal_6015a297e628f.pdfIn PDF document text
    • http://trylait.club/ponasuwobiror0mzmw.pdfIn PDF document text
    • http://topshops.website/little_prince_movie_music4o9vc.pdfIn PDF document text
    • http://itgermany.net/4946443105049rsc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413469/normal_5fce98bde29f8.pdfIn PDF document text
    • http://dorightunion.com/adoration_prayer_book57x09.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/rilexazejuzovep/52324601874.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/5sos_easy_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/adobe_after_effects_cs4_tutorials.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/minecraft_free_pc_full_version_multiplayer.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/zogusebowetovefidame.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_off0000cd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD35 5484 bytes
SHA-256: 264311ea96c21a734d6a8a4c219e0925841efa4d357a24d2705e400996593442
font_01_sfnt_off0000dfe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE3 11080 bytes
SHA-256: 49457ce01e0ecfdb2e286d254b861b60a38f74c62dc7c694a105472dda01ecdc