Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7502d66f2bd330…

MALICIOUS

PDF

79.2 KB Created: 2021-09-16 01:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: acbb8431e5160cfb5a93f8ac75203de7 SHA-1: 1f6c2845d7da06f29f32595699514a8847ba4073 SHA-256: 9f7502d66f2bd33028d7adcf8bac6ad013775b7dc9a84e53e5ca7dbcdd6ff36c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious. It contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the overall structure suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=wwe+2k20+in+mobile PDF link annotation
    • http://finchamauto.com/pics/mejegox.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/gofokavovisulumurorax.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/34451450705.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b329a4965---78080633253.pdfIn PDF document text
    • http://suchanekstomatolog.pl/files/file/pelebazezapude.pdfIn PDF document text
    • https://linardi.ru/files/file/24139240018.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/radulebavedabazaboferup.pdfIn PDF document text
    • http://daejonggyoyc.com/userfiles/file/20210913174558.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/04/zaxapofonigagejagitefowi.pdfIn PDF document text
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/lorokibiwapulowujibi.pdfIn PDF document text
    • https://novitas.ro/files/kupivonanadafurakawoweb.pdfIn PDF document text
    • https://kingwrapcarspa.com/upload/files/8091293965.pdfIn PDF document text
    • http://trieuduong.com/images/Download/71093613059.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5a3608465---39258958318.pdfIn PDF document text
    • https://norservis.info/files/files/juwawevakape.pdfIn PDF document text
    • https://5udua.com/contents/files/luximewenasajasuz.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/mudedakubobusuvajuvis.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/buzevugisobexiloziwofabo.pdfIn PDF document text
    • http://euromarkcreations.com/new/fck_img/file/jafirusikibugixevigejakuj.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/47153339122.pdfIn PDF document text
    • https://huaienclinic.com/uploadpic/files/xugojaluwinexikosutuj.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://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_off0000d3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC14 10296 bytes
SHA-256: 42c7fa9e0bd5bc674648560fb63ed889ec85cec5db2cfb182911309a048864f9
font_02_sfnt_off0001033a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033A 17364 bytes
SHA-256: 4d38cd174ff3e94ac0ca813d200a9bdcf87363d3d0a7bc5313bf834b7a604690

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