Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa3c1bd685a5182…

MALICIOUS

PDF

70.9 KB Created: 2020-12-04 21:43:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a65490ac48bbe2dbf380ed562dd395dc SHA-1: 92ba1f9f306a6f7313e29c742fe9f8c41041513d SHA-256: 8fa3c1bd685a51823bc60aec7c94ac7a40baec39a6f6928447e9fb8b5192b51f
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/strik?utm_term=academic+calendar+nyu+shanghai PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501479/normal_5fc841e6427ad.pdfIn PDF document text
    • https://teraxumafelenug.weebly.com/uploads/1/3/4/7/134747654/xapigiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_5fa1143e69517.pdfIn PDF document text
    • https://fifimijo.weebly.com/uploads/1/3/4/7/134748793/55383e8.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/mulerux/gail_india_ltd_annual_report_2018-_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7353aea7-97b7-4acc-97ca-9d3ad06f5d01/pogumudetuxafilizob.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/swot_analysis_of_pepsico.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/30583309427.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/below_game_achievement_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65808403f5353fdbaadc9/t/5fc6cd24ad3e64119231593d/1606864165814/galaxy_watch_active_2_price_best_buy.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f8f692c50b1a1e77efcd/t/5fc43a113f75b166435a5f0a/1606695445495/mpc_live_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf54842dd96f5918e5aa13/1606374533165/xinetedezisegomepoxabepo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf7ab00f7af3919d326a6/1606219692197/xibuxuwosasudufusaruge.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_off0000d69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69C 5444 bytes
SHA-256: 4d0b3f476a623bf74b6cec1bd6f017e72ced546e8969c91bfad39ca79aecc7a1
font_01_sfnt_off0000e8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FC 11084 bytes
SHA-256: fea754a0875c06a798396bf7ff7b33d1b58fde14d87d9ba1105806b39c9e5d34