Malicious PDF — malware analysis report

Static analysis result for SHA-256 721ab1fb4bb59858…

MALICIOUS

PDF

71.8 KB Created: 2021-02-25 09:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 5567ac84e1eb866f15908e3a9dc597c3 SHA-1: 89e53fa4a8087dd157267ca0c3da1f24c59114e9 SHA-256: 721ab1fb4bb59858dd2580204c319d8a56fbcca2af0b8d519cf32ece7c555a20
96 Risk Score

Malware Insights

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

The PDF document contains a lure related to printer ink cartridges, directing the user to a malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a phishing attempt designed to lead users to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a malicious payload or redirect to a phishing site.

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://leonvi.ru/strik?utm_term=why+does+my+printer+not+recognize+my+ink+cartridge PDF link annotation
    • http://byt-upak.ru/68708630025jbieo.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/ehdifgA/lunozowabesivuzufusukori.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/jZgifRC/81049347338.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/aRoGjeS/newodudabiwigoduki.pdfIn PDF document text
    • http://antonioit.fun/74726223437p1jz6.pdfIn PDF document text
    • https://cdn.sqhk.co/sutadejuna/g9MwdAr/graphic_designer_salary_austin_texas.pdfIn PDF document text
    • http://reactivascotia2020.com/powerpoint_design_templates_engineeringey9j0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486353/normal_600954164d09d.pdfIn PDF document text
    • https://cdn.sqhk.co/mipekakiri/gfhhyYF/kurumifo.pdfIn PDF document text
    • http://soul-felt.com/pet_shop_boy_domino_dancingytazm.pdfIn PDF document text
    • https://cdn.sqhk.co/dusivubeleza/9l8tFih/91100004611.pdfIn PDF document text
    • https://cdn.sqhk.co/razilipot/bygCja8/31319065012.pdfIn PDF document text
    • https://cdn.sqhk.co/tigafita/iGRgfgj/dance_your_avatar_app.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/72941770958xzgsq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFC 5684 bytes
SHA-256: a1229dc4d5be8335b13fe45390e14022ccff91249e5fe9f3585301c5ef32c5ca
font_01_sfnt_off0000ee46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE46 10488 bytes
SHA-256: f5700489b92511ad06ab975be7748ffcbf32822544d723f518a71b858e0104cb