Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa8832eb9d4633f…

MALICIOUS

PDF

67.0 KB Created: 2020-11-20 07:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4e6e00eb5053d73e44f94d6bc0be35ce SHA-1: 1492066f72af63b78185c882ea53c68435ceee08 SHA-256: 9fa8832eb9d4633ff25c1f5ff706a306b8591c7e7011fa7adff5bd8c26c0e423
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://traffking.ru/strik?utm_term=case+in+point+complete+case+interview+preparation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4503309/normal_5fb43aa673613.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b55959c0-8fef-4420-a7ff-8e74f9714b41/51249909415.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/87163183765.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a0d2f72-4798-48bc-8113-df5a5c1e776d/minot_state_football_record.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4a14a1c-4a76-4d60-acf3-ac377dda96f0/ufcu_routing_number_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/82307645931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f151fb-0adb-4498-a501-12acd313d85d/poesie_la_cigale_et_la_fourmi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03eb3a4f-28b7-4305-b696-afed11438749/basketball_legends_unblocked_66_weebly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97b30b7a-d0a7-4fe7-9373-a7730d9d7740/mizejojuxuxatepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7fb38bd-ed44-4590-b58c-5ffc5ce1169a/gupelakubedidoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/579f2de2-3cff-4099-94a5-6c1804d84a0a/the_lottery_by_shirley_jackson_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a36fac0-e396-4a75-acc5-57d41630ff4b/que_es_interesante_en_ingles.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_off0000cb8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8B 5136 bytes
SHA-256: f0ec1aa60b25531e2a54a74647b6f808cd4b65990f45bbbf733800a3a65d7c47
font_01_sfnt_off0000dcf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF9 10000 bytes
SHA-256: 4d51ef680d45ebb308b91ab38d921559e2960ad9b9b74bc2e57091e8e376b1ff