Malicious PDF — malware analysis report

Static analysis result for SHA-256 72102eb0bb0bf8ee…

MALICIOUS

PDF

76.7 KB Created: 2020-11-25 17:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c468c730c23485834a0d21df965ab9ff SHA-1: 316e90c1eca6b84379c093214488a325bfb77e07 SHA-256: 72102eb0bb0bf8eef01c881f32b705afd74ff6ca01f0d840fb21be1356e5347c
156 Risk Score

Malware Insights

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

The PDF document contains a lure for a "clash royale hack tool pc download" and hosts a large number of external links, many pointing to PDF files on Weebly. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the extensive link farm suggests an attempt to distribute further malicious content or engage in SEO poisoning.

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
  • 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://traffnew.ru/123?utm_term=clash+royale+hack+tool+pc+download PDF link annotation
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/dowubuna.pdfIn PDF document text
    • https://mejawazur.weebly.com/uploads/1/3/4/2/134265830/82acca9b03876d8.pdfIn PDF document text
    • https://zapirugitoz.weebly.com/uploads/1/3/4/5/134508168/3087945.pdfIn PDF document text
    • https://kosemezaped.weebly.com/uploads/1/3/4/7/134711049/javuvovuvamige.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/tinonusajagaxe.pdfIn PDF document text
    • https://zinikedefi.weebly.com/uploads/1/3/0/7/130740178/2412048.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/narisatesepujiv.pdfIn PDF document text
    • https://jasebezaf.weebly.com/uploads/1/3/4/6/134630561/nogumim.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/tadovu/automatic_transmission_book.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/mujomukilekudetaw.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/use_case_diagram_for_online_hospital_management_system.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/python_crash_course_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/kefuvigokofit.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/ugly_sweater_contest_certificate_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE615 5324 bytes
SHA-256: 9a16de864ea68aa4e6483d7000979497e7f38344711f4564f72bfaf1c4bd3bca
font_01_sfnt_off0000f834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF834 2092 bytes
SHA-256: 0f740872c9ba99ba2808e86ca1aa710947acf25eef927d3004a187dd3557d740
font_02_sfnt_off000101da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DA 10416 bytes
SHA-256: 3f489fdf37e138529b15d122d9121c6a7aff7778f34b4bef77c469f2495e841b

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