Malicious PDF — malware analysis report

Static analysis result for SHA-256 097e44fc744f6ffc…

MALICIOUS

PDF

67.6 KB Created: 2021-01-23 03:09:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b7c58eba6af77793713f852d2b80b05 SHA-1: b475849d148cb696cd1d8ec61929e95797fea67b SHA-256: 097e44fc744f6ffc094c41a976b7bce4fb573601480a4bf88f4e2e6eaa2d327f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by the PDF_URI heuristic. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically phishing. The embedded URL likely leads to a malicious site designed to exploit the user.

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/123?utm_term=yoshi+copper+grill+mat+reviews
    • https://site-1176380.mozfiles.com/files/1176380/jiduvebaxu.pdf
    • https://site-1209831.mozfiles.com/files/1209831/repabejawilenipil.pdf
    • https://site-1200133.mozfiles.com/files/1200133/bexasemasuxe.pdf
    • https://site-1174086.mozfiles.com/files/1174086/worksheet_1_metric_measurements_conversions_answers.pdf
    • https://site-1179273.mozfiles.com/files/1179273/30596514775.pdf
    • http://dunetetemob.22web.org/58655896809.pdf
    • https://cdn.sqhk.co/novimabe/qDjdxib/pedowijozesekanu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sefepugolupalax/xilexugerej.pdf
    • http://mexowotevofo.rf.gd/bible_free_in_tamil.pdf
    • https://s3.amazonaws.com/zesixefe/sas_stat_software_free.pdf
    • https://s3.amazonaws.com/wizedumi/slipknot_all_out_life_mega.pdf
    • http://nufewaruxemo.epizy.com/robotic_process_automation.pdf
    • https://s3.amazonaws.com/pukaridimupo/xotoxutevekatuxexigedura.pdf
    • https://s3.amazonaws.com/tesapibebujep/degiluforenug.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc6c.bin
deccc424fb4c13cc9f7d90b73b0b3bf0da91da4fc3ac8762770c2ff218e75905		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6C 5460 bytes
font_01_sfnt_off0000deeb.bin
06aadd186cddbd5dd8ea093e65f8ebfa4c7081085a85731495571d34f9e847de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEB 10196 bytes

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