Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0e2b3dced08a63…

MALICIOUS

PDF

78.0 KB Created: 2021-06-29 04:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9100c05da2ad6062d2e9121c0fe8dfd9 SHA-1: 8123cde62d97494ba70b827a371ac19f3d7b8e76 SHA-256: dc0e2b3dced08a6308554976f658b3f34d809035b3487b149a805a69b64a52d7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites. These sites host other PDF files, suggesting a multi-stage attack designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8718

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.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c558959089a---fivakijurosukotazixux.pdf In PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/eeaf860adb181f8efe58e46594f3886e/16058286539.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/2anamjd4320m8k3inn1lon5kli/vurufejusolaxiko.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/eperetuwetanikobetulome.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/a49f426bdfcad4166ff5b54a6282128c/jexevuvozapajusojupan.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f09caff14---41271282505.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/76288354808.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160840b89eb971---ziwowopojafudaludiraj.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160805aa664689---13642467505.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/farelopuji.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/rifogukovimozad.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/duralobumenef.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609db07c935cb---dedunisixakalaro.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/4ad2711c64166753b003f560a8a0cb0f/givupitin.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb602b5158---66066030503.pdfIn PDF document text
    • http://willismctyeire.com/clients/c/cd/cd1fd5262213d36872a77bd42df049b7/File/54004106059.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba38ada2860---gumamo.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/kanobuzitonad.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160aab7bf9e589---texizegas.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd513cd499f---17398494837.pdfIn PDF document text
    • http://mlkscholarshipsmilwaukee.org/clients/f/f0/f021f13c5c598389be7e913a1ae626ff/File/27126120604.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=girl+with+a+pearl+earring+recreationPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF182 10612 bytes
SHA-256: 7378de1170aaee9aea7650889329fdf3fd458c42becc42d1b72b3a3ea2aabe8d
font_01_sfnt_off000109c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C5 18284 bytes
SHA-256: 72724c15ac635ac7291d852b2304f6326d7549b1a4742df59ec1662bd880a8ea

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