Malicious PDF — malware analysis report

Static analysis result for SHA-256 e427b081281edf40…

MALICIOUS

PDF

78.4 KB Created: 2021-03-25 18:08:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7279e36963246aa500f0c3f3c93f35a7 SHA-1: 812a6de424bbf83856e628a62171b52c8f058dfb SHA-256: e427b081281edf40c111e4a935cdf28a977998785c11fcbcab3453500096248d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which point to other PDF files, suggesting it functions as a link farm. The primary malicious URL identified is 'https://xezojetit.ru/wix?keyword=binog+fallen+order', which likely serves as a lure or distribution point for further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wix?keyword=binog+fallen+order
    • https://cdn.sqhk.co/zukuxenopo/UhaieEM/97849954568.pdf
    • https://cdn.sqhk.co/sifalavuxozo/6rSweie/70833255332.pdf
    • https://jezuvafu.weebly.com/uploads/1/3/5/3/135348480/getiwiroji-rusedejevoma-jerirefoka.pdf
    • https://cdn.sqhk.co/wefonasifaza/sjrYhd1/school_management_system_wordpress_theme_free.pdf
    • https://cdn.sqhk.co/zojoguxuban/vXcQjfy/66286080932.pdf
    • http://copyrightsupporteds.com/1651766783jv4p2.pdf
    • https://cdn.sqhk.co/sinonari/SyicieB/41885173294.pdf
    • https://lagomide.weebly.com/uploads/1/3/5/3/135304015/bitupapuroki-wejonidugevobow-rikugixixumizid-ralomodo.pdf
    • http://reduslimitaly-ufficiale.site/comparative_and_superlative_sentences_worksheetsytggw.pdf
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/8128954.pdf
    • https://silorofolukut.weebly.com/uploads/1/3/4/2/134265947/177731.pdf
    • https://cdn.sqhk.co/ratijojitud/67KBheX/amusement_theme_park_dubai_city_beach.pdf
    • https://cdn.sqhk.co/xivovido/gcmIuje/8730975363.pdf
    • https://cdn.sqhk.co/xewiliwilax/hdgzLic/wajex.pdf
    • https://cdn.sqhk.co/wokiwife/ih0iDXn/kojikikukejusezora.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3a5aa097-47f9-475f-9992-83bceef25cc3.filesusr.com/ugd/f55bec_3d8c7625ebd544e1a3f1440cc449756c.pdf?index=true
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_ae73421b99a84ebb99ea8b5f91928ce2.pdf?index=true
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_8bc9b66561134db7a5c3e2d57e60cdf3.pdf?index=true
    • https://cd753cf5-d90a-4073-9c55-931a76e81761.filesusr.com/ugd/8826df_28f2a6014b3647fd9c3e90af96ec594a.pdf?index=true
    • 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_off0000f2fb.bin
ac8b01f3e513bca581d4d5a4c5b9747ec8396366d87df7fa1bbc397385cd0905		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 4948 bytes
font_01_sfnt_off000103e6.bin
c7927306ab17e225ac1405c179b1e7c5b9b4ade7a71be4f84274e5f35d08398e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103E6 12296 bytes

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