Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd74c98ff8c20004…

MALICIOUS

PDF

76.7 KB Created: 2021-03-01 06:51:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 39ddf0e008fd4b5f8454ca1d869d1fe4 SHA-1: 79ee38cf7e451b13f2f030fcb256b8ff96cc9916 SHA-256: cd74c98ff8c20004941a957d339db9be485cefa331b3fc46ec3110ce3fe86986
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a malicious domain. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, appears to contain metadata related to 'wkhtmltopdf' and a title that could be a lure. The presence of an external URI suggests an attempt to redirect the user to a potentially harmful site for further exploitation.

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://xezojetit.ru/strik?utm_term=junot+diaz+drown+short+story PDF link annotation
    • http://rasezinetoge.iblogger.org/vande_mataram_ringtone_lata_mangeshkar_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_6032b0edb9eda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424378/normal_5fddf7c3f25e9.pdfIn PDF document text
    • http://pejofewetoz.22web.org/mulagulevib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476939/normal_5fe45ee02b110.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/znggjcd/sawaxatin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tibelobal.epizy.com/agreement_termination_template.pdfIn PDF document text
    • http://peregal.epizy.com/kuriwu.pdfIn PDF document text
    • http://mudivakerimenog.epizy.com/benyamin_biang_kerok_reborn.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/gegar.pdfIn PDF document text
    • http://dakawat.epizy.com/wirajiwu.pdfIn PDF document text
    • http://zimeketoxera.epizy.com/69633432445.pdfIn PDF document text
    • http://gelepovasogadax.epizy.com/godakapovaxelajadeb.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/73323281387.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/class_specific_character_sheets_5e.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/60626486767.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_off0000efa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA0 5116 bytes
SHA-256: e60c458e73443c981a992fc3fb8d16e090fdf5660d025883715eed29291329b8
font_01_sfnt_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 10916 bytes
SHA-256: 91a7f8aa8a679a252c6950af45a7b1dfed999077362ae313a758c919354a46e4