Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ec1fff745e645e…

MALICIOUS

PDF

79.1 KB Created: 2021-03-20 15:27:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2481c8c1d209223f36f64c57f42dd4a SHA-1: 231cd03250629f5a6e5bc67586d5f60b651410b4 SHA-256: 92ec1fff745e645e7286de1dd642ead2776fb25fa0760e7c410317a916b107a0
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, which is a common tactic for phishing or distributing further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/strik?utm_term=can+i+play+flight+sim+2020+on+xbox+one
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/mefemiga.pdf
    • https://cdn.sqhk.co/totafeta/akbTih7/gebofewuzotewiditogik.pdf
    • https://cdn.sqhk.co/vizinifum/Yiijdgd/virginia_green_new_deal_2020.pdf
    • https://dapalirodo.weebly.com/uploads/1/3/1/4/131483520/2541121.pdf
    • https://cdn.sqhk.co/xeliwiwogivo/jiMjgVx/57270220932.pdf
    • https://vijuvunido.weebly.com/uploads/1/3/0/7/130740607/f6fd2.pdf
    • https://cdn-cms.f-static.net/uploads/4481275/normal_5fe8f38d2cc82.pdf
    • https://cdn.sqhk.co/videgogaf/WHuWhaJ/lunudifegizugu.pdf
    • https://cdn.sqhk.co/nakizenonetu/1DhhTTi/sakajalelo.pdf
    • https://cdn.sqhk.co/xuwifoviwalo/cjibbt5/grass_cutter_sword.pdf
    • https://cdn.sqhk.co/nivazesoj/4KknNgf/97707916255.pdf
    • https://cdn.sqhk.co/juxefirapuf/hgigYgd/risubilalogox.pdf
    • https://cdn.sqhk.co/befozaxulot/ZhdQgey/2713363249.pdf
    • https://cdn.sqhk.co/xomorenut/ifgiggh/wetabeluj.pdf
    • https://static.s123-cdn-static.com/uploads/4402722/normal_6007c4ec5ba3c.pdf
    • https://static.s123-cdn-static.com/uploads/4385427/normal_5ff23fc047ce2.pdf
    • https://cdn-cms.f-static.net/uploads/4424997/normal_6055b322be3e9.pdf
    • https://cdn.sqhk.co/navotezive/eajbjfj/weather_forecast_portland_maine_usa.pdf
    • https://mobafowowa.weebly.com/uploads/1/3/3/9/133997459/6018924.pdf
    • https://sarowamirubene.weebly.com/uploads/1/3/4/7/134736793/digerugod-waxeti-fofivupawunibug.pdf
    • http://brumbum2.xyz/versa_lite_not_connecting_to_iphonefly3p.pdf
    • https://static.s123-cdn-static.com/uploads/4412387/normal_5fecbc201c479.pdf
    • https://cdn.sqhk.co/genamudazunu/4YVhdQv/new_saiyan_battle_and_super_dragon_mod_apk.pdf
    • http://datingdate.site/xuluvutusogusuxuzadohrrl9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f3b6.bin
9f7f0a535fd50dc13112b13bb71b956a6da813c4e5041f5773e7ea7283c440b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B6 5708 bytes
font_01_sfnt_off0001070c.bin
9ec8a304eea542fa48efaa0f7e9e9dfe8732b8aa1a9d8b60c3cea1553e73fb81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1070C 11096 bytes

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