Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b9097ebeea80fa0…

MALICIOUS

PDF

72.7 KB Created: 2021-01-15 10:09:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 66d613f5775b32cba58ac02073e368c2 SHA-1: 795718fe41fb70c7ff6e7ccb94de94f9c180902d SHA-256: 8b9097ebeea80fa076db71714b2e4a2dc57049cd4cadc9bcdf62d0bbefb1c29c
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link to 'https://cctraff.ru/wb?keyword=2019%20fiba%20basketball%20world%20cup%20team%20usa%20roster'. Another critical heuristic indicates a PDF link farm, suggesting an attempt to distribute or redirect to multiple malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/wb?keyword=2019%20fiba%20basketball%20world%20cup%20team%20usa%20roster In PDF document text
    • https://site-1172607.mozfiles.com/files/1172607/jezaxajitesuperozunonem.pdfIn PDF document text
    • https://cdn.sqhk.co/lukumuzu/ejbifuo/zombie_tsunami_apk_hack_todo_desbloqueado.pdfIn PDF document text
    • https://cdn.sqhk.co/zaperarori/d1igfij/sefekatojonarirat.pdfIn PDF document text
    • https://cdn.sqhk.co/mojikeke/zhgPWQh/social_intelligence_test_eyes.pdfIn PDF document text
    • https://vukaxibunima.weebly.com/uploads/1/3/4/8/134885707/joxuxudox_wuduwudukosimo_botuzi.pdfIn PDF document text
    • https://purowuma.weebly.com/uploads/1/3/4/4/134472698/fufaresafev-modinatasebibub.pdfIn PDF document text
    • https://site-1213938.mozfiles.com/files/1213938/crowd_war_3d-_rush_city_games_day.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/bejenosugede/minecraft_fireworks_crafting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/propiedades_del_enlace_ionico.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/zezimome.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/16451663953.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/49966596915.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/konica_minolta_206_scanner_software.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_off0000ddd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD4 5984 bytes
SHA-256: 4b573aea7636ac9a7b17aced5603625757b46ed4adecdc86ac49b0a257d763d5
font_01_sfnt_off0000f22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22E 10360 bytes
SHA-256: 246044fd2341091b2492ea7db346a48e444ff1e55a7af18f7c5038b41a299a81

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