Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1893cafe023ab3f…

MALICIOUS

PDF

82.8 KB Created: 2021-02-23 22:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ae6540f4fd9b23e5344506b367092993 SHA-1: 7502fe9855ffe052392db595e3e6165d7eb7878c SHA-256: b1893cafe023ab3fb5d5259e42353eb1b04f99adf92ce45ee883f793469e513e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URL pointing to a suspicious domain, which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to a movie summary.

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://leonvi.ru/strik?utm_term=el+mundo+de+sofia+pelicula+resumen+por+capitulos PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496148/normal_5ff7828d9bb63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465924/normal_5fe7f79b7d6f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492529/normal_5fcd65ecd1fa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380079/normal_6014077336b7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426422/normal_6027d6e5440fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_6019d9c3c6847.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489975/normal_601c5bb840823.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446036/normal_6007d1e3315cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469378/normal_602fdd3e2173a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489733/normal_600dcd4f00404.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379970/normal_5ffcdbd91241d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466386/normal_6007c2bacd383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_602b5203a20aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505771/normal_600b91926b0f2.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/luworizesupox/59998799792.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/converting_measurements_worksheets_grade_8.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/carsguide_ford_ranger.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/how_to_use_onenote_effectively.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/has_been_heroes_challenges_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/brittany_renner_judge_this_cover.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_off00010499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10499 5256 bytes
SHA-256: abbcf26c80106f3c656fa93cbe8ff09180f5dfbadb34f8b8739e2d4fbc5dc1d7
font_01_sfnt_off00011669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11669 11556 bytes
SHA-256: 7f0a8e4fb08aa345a4c2831dea3b1695b4ef405aa87d8e9a8fb2f8c845fe86da

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