Malicious PDF — malware analysis report

Static analysis result for SHA-256 130185a661d02549…

MALICIOUS

PDF

74.3 KB Created: 2021-09-16 09:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 9ec39e9f4513e8976e38447d0e37fa65 SHA-1: 887ab2bda5c286a6f8c9c1f41d6a3b18b07aa64e SHA-256: 130185a661d0254908640dd437f1768d60400b6a3398b030c69e07e3e8d35ec7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dienhoanghean.com/upload/ck/files/82986276201.pdf In PDF document text
    • https://raljob.com/userfiles/file/72424269938.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16133c26488922---gewamewakibaxalomi.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/96028146724.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/nulasiragisezatilezisoret.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/bukinodoxo.pdfIn PDF document text
    • http://vuadiemtayninh.com/hinhanh_fckeditor/file/59542680379.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/jifadedogejenegedamiz.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/bomadubopemapodesitoli.pdfIn PDF document text
    • https://hirurgija.me/files/67649103533.pdfIn PDF document text
    • http://sergeybazarov.ru/file/40061961860.pdfIn PDF document text
    • http://arhive.np-sp.ru/img/file/59957696198.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021090404132856.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/89904015660.pdfIn PDF document text
    • https://warungmimpishio2.com/contents/files/74035228283.pdfIn PDF document text
    • https://specialgarden.ro/userfiles/file/dafozokefefazitof.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/45484954713.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/15907005093.pdfIn PDF document text
    • http://risme.vn/files/gufuxobikowopigejovi.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/61130611218.pdfIn PDF document text
    • https://soechi.net/userfiles/file/kobulabodavazozifa.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210914082935.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/vimuvojubopegokimaxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=game+4+player+androidPDF 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_off0000bd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD583 10516 bytes
SHA-256: 054cc527c8d91e02c9dadbacb8a03355b3c8192795da06b5ceb1faf949d91b68
font_02_sfnt_off0000ed64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED64 17972 bytes
SHA-256: bdbf12448639b55e3902900011764bd5ef03ea0c534b102e0a1d90e6f2076ac2

Open this report in the interactive analyzer, or submit your own file for analysis.