Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f809f896bb7f797…

MALICIOUS

PDF

59.5 KB Created: 2021-07-19 20:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 97a8f1559f57137e87a0e24381590141 SHA-1: 5b8d67b48af7b1306354332d323f1e0f3a45f41c SHA-256: 4f809f896bb7f7978fc739c15b9fc08b3344ed336480cf5406e4a14a34dead12
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF file contains numerous links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware hosting sites. The presence of external URIs and link farms suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6876

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://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160e3f3a3aa65f---kawuz.pdf
    • http://st-ark.it/userfiles/files/45048230372.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/913304abc3ddebd6c84a9d94bd94ad07/fuvedi.pdf
    • https://24emk.ru/ckfinder/userfiles/files/vuvekazakomajepawimewase.pdf
    • http://daimarconstrucciones.com/images/admin/file/48296108283.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081752ae5457---noxefixisegivilopolevaxu.pdf
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/81e7ec8b42bebfe0890e699ad5dbdd37/sesorudav.pdf
    • http://lorichphoto.com/pictures/file/91076039866.pdf
    • https://anpheatingandac.com/nbloom/fckuploads/file/69904074110.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e2cc142f643---11174025333.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/dfdf7f8583ef9d65d17077ed4d0f6b26/gewoxobo.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/74bjlk50b5g98c5iqhqsgqflql/tagupetofolemabow.pdf
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/96521719175.pdf
    • https://hoangnhataudio.vn/media/files/mezaxanezopilababu.pdf
    • https://laughteronlineuniversity.com/images/upload/files/37412527150.pdf
    • http://faw-asia.com/image/upload/files/13844152597.pdf
    • https://ajitcoatings.com/uploads/27111474152.pdf
    • http://kapli74.ru/upload_picture/44345690835.pdf
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/80a42fea51741080d5b091bfbbc1e0ae/wujixekasapoj.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/5b36403d001997541068342bdaca9e09/70648190215.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607487fac99f9---saselodogozifibuseg.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/53193ba7a28c80307d50ba25d4da3e7d/16753741825.pdf
    • http://afghansolar.com/userfiles/file/miboxuravuxitolajanuzo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+many+many+ounces+in+a+quart

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