Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f34b9beac3ee7c4…

MALICIOUS

PDF

124.5 KB Created: 2021-07-02 02:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cafb24e4e60b7cf9cd117092d14237c8 SHA-1: 913c939592bc2d6b04bd3ab80b231a3d44ce43f0 SHA-256: 6f34b9beac3ee7c426bb46fc0412abd214f7de35547c6b6983a647fa6723120c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of multiple external links and the nature of the hosting suggest the PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6608

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://files.ibiza-ferien.de/file/wamodunijux.pdf In PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/jdt6sg2b8p2r1g3s108ppht6dm/rubivefozegeku.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/4b14f7d9765547774330797543645618/85087637296.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/6ns06fg5kq5lcavhoodpvbbhtk/84550352533.pdfIn PDF document text
    • https://cmoretv.com/userfiles/16751915890.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/060327446812.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/93141413999.pdfIn PDF document text
    • http://chikatere.com/Upload/files/59821037677.pdfIn PDF document text
    • https://chpcentre.com/files/file/kilidatabadukesebutew.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090cf043d69a---warexeraviwejekol.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73f5f6ce2a---dijujo.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/tg6f9nvktjdqgs21i6b9rcrp79/99727083209.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/30952677545.pdfIn PDF document text
    • http://mtcclassof81.com/clients/0/0a/0a45bd3013a8cc77df817aa526a911b1/File/93489862252.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/konagobenesezu.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/41695324965.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/82517010518.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/qmfk03fddt5ve7suctnfe0sb3s/ripenakozewunemexet.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607446885ca9b---boduvepefuk.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/66509054353.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/wunenesamezunaleliletiweg.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cb8c067d1---53010145719.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc51d765da---vuzoxegepixasebisakujewuk.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077c8ec895d7---fogudiw.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/novuwukated.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=pray+with+expectation+scripturePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C00F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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