Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa59a2847db955f6…

MALICIOUS

PDF

78.9 KB Created: 2021-03-21 12:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 249075b8dea387b33f6478c29a9e99b1 SHA-1: 80c13db054e2ef5e81cf97ebb2ecebc42ab568c8 SHA-256: fa59a2847db955f6a7a5f3fa909c81dddeb2ab7fab9624a3a8de2095d1f2ea6f
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 0.9996

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://botokaw.ru/strik?utm_term=does+walmart+sell+g+shock+watches PDF link annotation
    • http://rerubin.space/laura_knight-jadczykgs0x4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445326/normal_5ff5cbe60e310.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/28208991885.pdfIn PDF document text
    • http://teasmall.space/jamakuxeda8x519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417205/normal_60445c67a85df.pdfIn PDF document text
    • http://italiahot.fun/is_starscream_a_decepticonbgub5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466657/normal_5ffe145d36bb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490365/normal_600448dbe67de.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/tudowevezef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386079/normal_6054c13019a50.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/lamavakab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475866/normal_603dfa87776b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479705/normal_603e4c77e166e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417405/normal_5fe7d30c33948.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404515/normal_60009a72d6f7c.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/building_android_apps_in_python_using_kivy.pdfIn PDF document text
    • http://dimopun.mywebcommunity.org/2049372820.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xorabaza.rf.gd/ccse_exam_full_form.pdfIn PDF document text
    • http://gupizamowakop.myartsonline.com/19837312673.pdfIn PDF document text
    • http://dusetelonuzaj.epizy.com/91037186899.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/causas_de_la_caida_del_muro_de_berlin.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_off0000f3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EB 5368 bytes
SHA-256: 212a0d15a247687ddd596fc4c22daa8f68965034dabcbf839162279019a08141
font_01_sfnt_off00010619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10619 11644 bytes
SHA-256: cfbd92726ca718a7c55fc2a3ef5255a6a1cc0446ce81ef4460ab95d368dd65ca

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