Malicious PDF — malware analysis report

Static analysis result for SHA-256 07796e9cfe6e406d…

MALICIOUS

PDF

73.2 KB Created: 2021-02-26 11:44:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 449781f008236666f21fda339f997362 SHA-1: 74e82b3cbc70769f4e91e7e434ed8506f3333fa4 SHA-256: 07796e9cfe6e406d6e908a29d911b9431be69998176c04962cda8a2bf4dd59aa
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'zajinet.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a 'Bunker hill security system manual'. No scripts were extracted, but the presence of external links and the malicious verdict strongly indicate a phishing or credential harvesting attempt.

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://zajinet.ru/strik?utm_term=bunker+hill+security+system+61229+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5fea27b5c7412.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388416/normal_600baebd9cdb8.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/H3ibUgh/57271786089.pdfIn PDF document text
    • http://summer-italy.fun/rexevejenezulejox24gc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500904/normal_5ff00ef521f29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527859/normal_5ff036da56c13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470972/normal_601e48502a4b1.pdfIn PDF document text
    • http://ligovezedeje.iblogger.org/total_conquest_offline_free_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/ghbhfic/egg_wars_minecraft_server_no_premium.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/bugutaj/gimewogepogisupuw.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/shirt_cutting_stitching_video.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/finsbury_food_group_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/bibixe.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_off0000dfb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB7 5748 bytes
SHA-256: 1e52aa0187b66ee6d68f89d841f4db92fb5c26614bba4db59e41c9779922cdc1
font_01_sfnt_off0000f328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF328 10844 bytes
SHA-256: 7ccc235d519f8a6779bb4f27107c655c34ee5f02bf6969da7924dbe0a09dc977