Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf24d6f8a5bb6eb…

MALICIOUS

PDF

93.7 KB Created: 2021-05-22 07:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 42ea056c89490b5f93d8ee7018b228f9 SHA-1: d77754b06b39381fd1170433bfc06fc0015935f7 SHA-256: 3cf24d6f8a5bb6eb00b81ea831613a175aeae50b8eabe00cccb6459ad0929569
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL suggesting a download lure related to "Naruto vs bleach". The ClamAV detection and ML classifier strongly indicate maliciousness, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=naruto+vs+bleach+400+characters+download+pc PDF link annotation
    • https://xojemejavema.weebly.com/uploads/1/3/3/9/133987363/fdd3fcf1d16593.pdfIn PDF document text
    • https://bopelesi.weebly.com/uploads/1/3/0/8/130874615/bewutewudul-tupukep-jufarazi-gobadufegakeze.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/ca501fe8-c88d-4e24-a529-a5d78a433a09/tabla_periodica_de_los_elementos_quimicos_con_nombres_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae7ad0c-5664-450e-8dbe-0c41d7247a7a/doa_barbara_novela_telemundo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a095c409-1fef-4f11-a34c-3821a025974f/51338621711.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/83445868243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/045990a3-5fcd-4338-888d-8bb10bf1bb0d/gurezitiwiliwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06e97c2e-033f-4040-b14b-d735a7189cb3/tavudukugagufip.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/adaptogens_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/747bf725-4ba8-400f-959e-f91088f69277/sears_garage_door_opener_troubleshooting_lights.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/60847604569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b1e7c17-9aa8-41ff-b1c3-cee2bc25a2ab/33642632237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4a82279-28da-40ee-8c65-9e5b599f0a61/html_css_bootstrap_jobs_for_freshers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f1bb46d-d3cc-4f37-a31f-3aee7e302f03/oxford_dictionary_free_download_full_version_for_pc_english_to_english_for_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/82278475975.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/spreadsheet_javascript_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3422da56-1413-4de9-8be9-1fefe18fc6c3/how_to_fit_vileda_spray_mop_together.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e75bdba-0875-4b6c-8bb4-a76e1591f2cd/my_shakespeare_macbeth_act_1_scene_5.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11229 5652 bytes
SHA-256: 0dfabb79f50af4fc4b689aca74f72259c3d53821954fc424de31586c59320693
font_01_sfnt_off00012576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12576 13340 bytes
SHA-256: 6dfc0747411cfd2f015b599b3ab3f0ad24a25f8df9a7ee2f4826ae861d5157d4
font_02_sfnt_off000150f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150F7 17040 bytes
SHA-256: 0d6bf116b0295f22177f161febdb0e5ae3b5a6220073c4961cdafeb812e75d2a

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