Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef76fe7123555e0…

MALICIOUS

PDF

97.1 KB Created: 2021-02-16 01:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b2b16696797e6d20410646c95c79ca19 SHA-1: 813f61af8577ebaca66aa481e45efd2398154754 SHA-256: 3ef76fe7123555e03bc12851e203c58060737282212b7816e4614d6af3700929
96 Risk Score

Malware Insights

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

The PDF document contains a lure related to Roku remote issues, directing users to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of external URIs and the document's deceptive content suggest it's designed to trick users into visiting malicious sites.

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://baarspo.ru/123?utm_term=what+happens+when+your+roku+remote+doesn%2527t+work PDF link annotation
    • http://lnstagrambusiness.com/foetid_bloat_drone_data_sheetfkamd.pdfIn PDF document text
    • http://getbuiss.online/contract_bid_templateun0g9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426953/normal_5fe810b83d7e0.pdfIn PDF document text
    • http://itchia.space/60697756587a1im4.pdfIn PDF document text
    • http://baxemoge.iblogger.org/960998713.pdfIn PDF document text
    • http://zabavnyi-slon.ru/lfs_araba_yamalar_tamindir6gfx6.pdfIn PDF document text
    • http://cleanup-sale.site/who_stars_in_minority_reportbeyiy.pdfIn PDF document text
    • http://bu-markett.com/nufovawizekifapokisira1rwyh.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/kovozenamofox/achievement_cv_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/61259957679.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/77095027362.pdfIn PDF document text
    • http://pazizota.rf.gd/la_romana_alberto_moravia.pdfIn PDF document text
    • http://sakiwut.rf.gd/muzaladasijotag.pdfIn PDF document text
    • http://jevusavisa.epizy.com/8803585683.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/46088612838.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/99861943436.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_off00013c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C2A 5472 bytes
SHA-256: ec09133e1856f80b0b53fd24f8f67a95fb058e7dd5cd65ab59fb4b3b77d9b0e5
font_01_sfnt_off00014ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EBC 11800 bytes
SHA-256: 766517c1a5be612257e5608fc1b3a485484df0a0dfeacff6684382690660b4ce