Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a9d9daafb83c79…

MALICIOUS

PDF

205.5 KB Created: 2021-08-21 11:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 3b0238cecd307628a00e3aecee014338 SHA-1: 06ffed9693e75a81e6eb61141f4fbdd0c618e70a SHA-256: f1a9d9daafb83c795d24f548bcaf9dd251b214ea11a600ee6d7bcd099d4357b0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8775

Heuristics 4

  • 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.
  • 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://abwcrainhwy.com/uploads/files/korapedonejapenenezitibim.pdf In PDF document text
    • https://najlepsze-w-polsce.pl/uploads/gokon.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efed0d956d---maronavakeva.pdfIn PDF document text
    • http://askort.pl/Upload/file/97426764379.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/b8osl6ecmnvqipk5edkic30oh1/72694691006.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60CE552F4D3CE.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/c5312eb2f3cd77eb0bb841aa60210596/vatopepijomi.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/zufejukewumim.pdfIn PDF document text
    • http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/kisolanojotoviduduzewipu.pdfIn PDF document text
    • http://unsersohn.com/images/file/puzotan.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/6844003096.pdfIn PDF document text
    • http://brooklinehs1964.com/clients/6/6a/6a3559cec3eb17f551da2d864c8c85ab/File/merome.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/60199135697.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/43341464280.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1610951e8136a1---8958862155.pdfIn PDF document text
    • http://ogbchurch.com/clients/880797/File/xidajufazesenirod.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/ludolokix.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/semevimemurubi.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/veveberuxubeg.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ab959623783---dosonowomiwunewineletujuw.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/s065sof2dnungi36a53hklmadn/mitiludaperunibegagolison.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/ed5721f4a21a378462976d1030f2eab7/5193320220.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611468c0e77c6---84175066244.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/zusowoxafasawopena.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210723223716320.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=ejercicios+de+equilibrio+rotacional+resueltos+fisicaPDF 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_off000320ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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