Malicious PDF — malware analysis report

Static analysis result for SHA-256 42dee0251887b2de…

MALICIOUS

PDF

70.3 KB Created: 2021-09-02 15:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fad3e27cb2617849a28952d83bc00b00 SHA-1: ad733787ddbcc00157119d94b1b73292e2f67d11 SHA-256: 42dee0251887b2de6c3af6cc64a1cf2b3ca113e47b15933566de90a66f61a831
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS upload directories. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. The presence of a link farm on disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6611

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 https://emenu.hu/editor_up/raxopasimuzivi.pdf In PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/eb70a0f92868aaefc3f7297ec3d58150/nosusuberarugefob.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19955848690.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92751286853.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/cct6os8a2cvc0h7ioacqq1mh04/safem.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dbb20edd4---kolibegigesuvebatu.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/pidegekedubedumoporiwubaz.pdfIn PDF document text
    • http://rld-carbon.com/file/janinegene.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/jalodigesipaxi.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b21d262501e---22607996772.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/9d4a7d282ae8d38ab536e08a1fa34b77/1112043080.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/55964686158.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/571bb13044e44d6b7b07d5fbffd5f346/46081937917.pdfIn PDF document text
    • http://boatmonies.com/uploads/files/79742833533.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/82552174788.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/7502138599.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/utdfhufc7d4b0gbhictcp7gst7/55679834360.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3687b0018---wobeguvigomugegimera.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ae98e56cc---40378970706.pdfIn PDF document text
    • http://dzbnf.com/upload/file///78531741787.pdfIn PDF document text
    • http://theettiaresottawa.ca/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/wajobokebiladijudepegewok.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/b6a9b598c79056697c7387c8a0c24fb5/2293687919.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c04b18a1a48---wagarigadugagarejupejuxi.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/29837467525.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=modern+chess+opening+theory+pdfPDF 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_off0000e129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE129 17256 bytes
SHA-256: 56a061f66da0e0d8f8ab583c5852f0bb69ebffb38c90763fb1490a00507adbe2

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