Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5dcec4e27fa19e0…

MALICIOUS

PDF

101.2 KB Created: 2021-09-07 04:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9cec12fe6360d8be51745ee959f79781 SHA-1: 4dbfe0787652fc8da3b04bb1ed5538b0795ca591 SHA-256: a5dcec4e27fa19e0933d80ab954b5df8c07a3f9acd5a43206388d4fe9b07a4ba
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised domains, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to malicious content or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7794

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
  • 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.
  • 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
  • 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://www.trotasierra.com/plugins/ckfinder/userfiles/files/94559157167.pdf In PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/c8fda42c5f92dc81ec024963a687096c/41604442505.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/rowunebenemiraketav.pdfIn PDF document text
    • http://come2menorca.com/images/file/24104498097.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/74782225153.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/hpla4r1fjlf9d2edp36q2vegm6/kagimitiminizowururu.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16270853032577.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d6e736f1486---39304628705.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e62ca584811---88973417943.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074cbf1537da---24105817818.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/nebojugapud.pdfIn PDF document text
    • http://bellsazshihtzu.com/clients/878694/File/lejojebelilu.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/bamonixe.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/cf3fc5667e41f2b9ae775e4d0ca295df/82060533007.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/tenivovujazadixalofosow.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160c28de657efa---putodoxovakeguzolovi.pdfIn PDF document text
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/roweteso.pdfIn PDF document text
    • http://vuason.vn/upload/files/17243370912.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a472e65e426---kumetakinefogal.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/19859878229.pdfIn PDF document text
    • http://lasermedia.cn/userfiles/file/kizepif.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/bagasuziloduses.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/r8liht0ipg5p5pl4io6dijbv0g/foribemoxaxuvubakularik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=encyclopedia+of+psychology+pdfPDF link annotation
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/87502625092.pdfIn PDF document text
    • 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_off00017a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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