Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e87b0f10037701e…

MALICIOUS

PDF

89.2 KB Created: 2021-09-17 11:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a972d57f5e93f57a579a07ea9c912ba0 SHA-1: 4bd216b2a811b9be7849d795030689c53c9c749b SHA-256: 9e87b0f10037701efc3ef22f4b4b373591f1625c442e3726ebfc98f356852b02
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns suggest it is used to redirect users to malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://justsayhi365.com/uploads/file/divekakojitusofufi.pdf In PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/00adc2688a673724993e48a8cc58aed0/5995161481.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/xosawudavelozoxenadosax.pdfIn PDF document text
    • http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/redulaxewopon.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/sasekusexetakuki.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/vigoxetamotosur.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/71827206849.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090719500473499.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/wigevefum.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/fonibozogagarijudegom.pdfIn PDF document text
    • http://russia-ex.com/images/blog/file/femowafasew.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/zedoredilimimofarovodak.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/zawenax.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/powekitupofasovorov.pdfIn PDF document text
    • http://gibisch.com/files/files/31112824784.pdfIn PDF document text
    • https://loppisidjupdalen.se/images/uploaded/file/62371616099.pdfIn PDF document text
    • https://jagamimpi.net/contents/files/57842338247.pdfIn PDF document text
    • http://gkz-crimea.ru/userfiles/file/64888591838.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/9719958732.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/12827891250.pdfIn PDF document text
    • http://itemclinicchina.com/ckupload/files/xabarezipatugusimikoxu.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/33151921758.pdfIn PDF document text
    • https://ginecologmuresan.ro/ckfinder/userfiles/files/fafexeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=jumanji+full+movie+watch+online+freePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E4 17596 bytes
SHA-256: c4ac13678062493419e01ca8477c27870be721cd6462f7ccfb50872bdc82535a
font_01_sfnt_off00012612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12612 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E29 10804 bytes
SHA-256: fdb071f84c66f49082ee8b37f9cffceb216d9468e462f3ff58b903f81a5fbc2c

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