Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d1f133883450b9…

MALICIOUS

PDF

72.6 KB Created: 2021-01-26 03:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6216206aea298e4c5955994551663223 SHA-1: 38a8de7b5ec4fa2780765d76feaed953dee6419a SHA-256: 85d1f133883450b97197b25f0695ebc3f0682ea43dcedfc8527c065f7f93c796
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The ML classifier also flagged this PDF with a high probability of being malicious. The document body, though heavily obfuscated, contains text related to 'car eats car 4 hacked unblocked', suggesting a lure to trick users into clicking the malicious link.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=car+eats+car+4+hacked+unblocked In PDF document text
    • https://static.s123-cdn-static.com/uploads/4500430/normal_5fc69df4f38f5.pdfIn PDF document text
    • http://xadimilok.iblogger.org/convert_word_document_to_excel_worksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365998/normal_5fe054f610cb8.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/mujevubutukoxu/zotavovuvuweluvarodu.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/fidemaluvimutenaz.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/high_mast_lighting_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/cod_battle_royale_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/making_inferences_worksheets_4th_grade.pdfIn PDF document text
    • http://fuxalobel.rf.gd/wudebirabafoto.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/nogujofaj.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/canva_graphic_design.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/division_of_fractions_worksheets_with_answers.pdfIn PDF document text
    • http://lujuxug.epizy.com/jibitunolubovufusebevodo.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/feravukim.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/balepopetavipoko.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/37050920089.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_off0000dde6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE6 5224 bytes
SHA-256: 51ad89a6eb1c428f7a25bddefc4104cbf1580cad5abd13f612f7547b9bb988a5
font_01_sfnt_off0000ef9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9D 11040 bytes
SHA-256: dd5df5349787cdc4268e3e36c3b8e51ec2ab9b4c57987d0aa6caf8542334d303

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