Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba454023e7cad76e…

MALICIOUS

PDF

73.4 KB Created: 2021-06-08 02:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cf083ba97dfd641530a224ebc45c1101 SHA-1: 959fe1d09cd82fd93474b8e39c84bb4eacc6c8fa SHA-256: ba454023e7cad76eacdc02a5a430349fb7ef18ad1774f1ecd0572748066621f2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/123?utm_term=audrey+hepburn+moon+river++free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424696/normal_5fdec82436f21.pdfIn PDF document text
    • https://gijixejuk.weebly.com/uploads/1/3/4/8/134880041/waliwonineber.pdfIn PDF document text
    • https://safusugefivelu.weebly.com/uploads/1/3/4/3/134346528/1ec495e44949.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5fe70b42aad2a.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4448094/normal_60b1f7144a828.pdfIn PDF document text
    • https://gazolono.weebly.com/uploads/1/3/4/7/134721713/zolezobida-xufusu.pdfIn PDF document text
    • https://sagezawi.weebly.com/uploads/1/3/4/3/134322896/6fa010465495d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451949/normal_6068b8e3c33a6.pdfIn PDF document text
    • https://webimilosajepi.weebly.com/uploads/1/3/4/8/134859137/6492537.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495413/normal_5fca82e9c4392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500200/normal_6015eb7790e38.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fijinatuzut.pbworks.com/w/file/fetch/144553740/felony_sentencing_chart_florida.pdfIn PDF document text
    • http://jananevava.pbworks.com/w/file/fetch/144743568/lutarutafatamelazokamez.pdfIn PDF document text
    • http://juvupumanut.pbworks.com/w/file/fetch/144493773/manual_para_extensiones_de_pestaas.pdfIn PDF document text
    • http://gufabewa.pbworks.com/w/file/fetch/144479304/76017277963.pdfIn PDF document text
    • http://kevesefazoga.pbworks.com/w/file/fetch/144685752/25046872912.pdfIn PDF document text
    • http://bukafag.pbworks.com/w/file/fetch/144572160/48990540138.pdfIn PDF document text
    • http://zigunef.pbworks.com/w/file/fetch/144479139/70942293581.pdfIn PDF document text
    • http://sejiliki.pbworks.com/f/how_to_see_travel_history_on_google_maps.pdfIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144811623/ecrire_automatiquement_les_chiffres_en_lettres_word.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 5152 bytes
SHA-256: a94052a2e97a96cefe34412918cfb5833c8ec751599095b56ef2219993716986
font_01_sfnt_off0000f5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E0 9692 bytes
SHA-256: 46fb2e7fddd544636feca4150fca611769a3a5a9307862a7c5ea30e766faa7eb

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