Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a700ec5a721bde9…

MALICIOUS

PDF

101.9 KB Created: 2021-02-18 05:28:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 099d1dc3c27159a200f7ae01d8e466f6 SHA-1: 223f84de85caa64b2604da43263f54c88a6e0749 SHA-256: 0a700ec5a721bde94b99abb105719f27947e5ca44063176e3000ee6f5ad871e5
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, many of which point to suspicious domains and are likely part of a link farm designed to host malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=does+damon+salvatore+die+in+season+5 PDF link annotation
    • http://betixisu.22web.org/79230021850.pdfIn PDF document text
    • https://xaxiduxaze.weebly.com/uploads/1/3/5/3/135308656/varipelina-kubokufizu-supozemixasip.pdfIn PDF document text
    • http://jevufoduxixan.22web.org/3d_wallpaper_for_phone.pdfIn PDF document text
    • https://faxomozux.weebly.com/uploads/1/3/0/7/130775398/b7b287a99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473432/normal_6000a47fa9900.pdfIn PDF document text
    • http://astrology-personal.online/betodapanumuwegui7w02.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/tutasujal/63214813022.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/40776736062.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/aplikasi_hack_wifi_tanpa_root_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/iliade_baricco.pdfIn PDF document text
    • http://xawoforusur.epizy.com/isomerase_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/absolute_value_worksheets_7th_grade.pdfIn PDF document text
    • http://jibefemojus.epizy.com/cisco_academy_exam_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/62100032310.pdfIn PDF document text
    • http://jisizulo.rf.gd/69732937734.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/tibosodirugodepawo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001519d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1519D 5156 bytes
SHA-256: 625911209d779369d43ed83cc63d62f197cf10d34666717e3257285f39620f36
font_01_sfnt_off00016320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16320 12160 bytes
SHA-256: b362511ba76f558928125994a7a7c2d56eb47b303bdb487bdcc0ee0ac8471659

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