Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c134cb04df461f…

MALICIOUS

PDF

74.6 KB Created: 2021-02-27 14:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33c48ec3679bed31cf3a466fccbff197 SHA-1: dc69567297c36f437ce2e3536b8f8c09d129baf6 SHA-256: 57c134cb04df461f585de7d28f1ebfb0f79564f27c3752375d4265ae2edd0a86
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The embedded URL, https://jumiwimov.ru/strik?utm_term=tc+renegade+hunter, is likely used to deliver a secondary payload or redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to exploit vulnerabilities or trick the user into visiting a malicious resource.

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://jumiwimov.ru/strik?utm_term=tc+renegade+hunter
    • https://cdn-cms.f-static.net/uploads/4373755/normal_6014d0978ccfe.pdf
    • https://static.s123-cdn-static.com/uploads/4378406/normal_5fcf4c6854d50.pdf
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/2112911.pdf
    • https://cdn-cms.f-static.net/uploads/4473656/normal_60365d02e5eea.pdf
    • http://gojavodevagajuw.mygamesonline.org/14283033431.pdf
    • http://zumasuxujole.22web.org/top_clustering_algorithms_in_bioinformatics.pdf
    • https://cdn-cms.f-static.net/uploads/4366327/normal_601b11550f362.pdf
    • https://static.s123-cdn-static.com/uploads/4529893/normal_5ff3e856d5eea.pdf
    • https://jitivafume.weebly.com/uploads/1/3/0/9/130969372/xuwavexejipo_lizag_gojisowapuwuzin_lorogaxelumodem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fadirejanebebi.epizy.com/16388280906.pdf
    • http://bidusopevix.epizy.com/1967_chevrolet_camaro_ss_transformers_bumblebee.pdf
    • https://s3.amazonaws.com/wotodedaruzuk/bhoot_bungla_songs.pdf
    • http://tuzegonu.rf.gd/annual_hr_budget_template_xls.pdf
    • https://s3.amazonaws.com/kezemiradigu/sample_audit_report_format_in_word.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e84c.bin
3a6b64df951755da34e3c033ef2c626d15520f17dd5d7b9206b370cbf3f9913d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE84C 4940 bytes
font_01_sfnt_off0000f911.bin
fc6c44acb6c55716b6ce8561882d971bd9b7537a911d3375a3fb15e69c58dc65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF911 10784 bytes

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