Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee63fadb7ebbee4…

MALICIOUS

PDF

83.8 KB Created: 2021-09-04 16:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ebb7e581eb531fb6913f3971c19b1ae2 SHA-1: f20ff3ef69f087481e3792f6412a0cae7b026e82 SHA-256: eee63fadb7ebbee450d46b1ae0012910e3a73e32ac6b2b9c0957a0e3abd7141c
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed multiple heuristics indicating it functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. These links are likely intended to redirect the user to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=chuang+tzu+pdf+italiano PDF link annotation
    • https://bouwservicewinthagen.nl/userfiles/image/file/82513679500.pdfIn PDF document text
    • http://bio86.fr/fichiers/semezusinofemanojiruf.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/61370178634.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc996666ea7---41087762134.pdfIn PDF document text
    • https://seltec.io/images/uploads/files/pibozuzawewisatalibu.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/4223954417.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/demenijij.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/71873386263.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/sopafazumenezazokibakixib.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/5ed9c9297f64866cb602b84b538021b6/gitenavuxevazunuxisukipot.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/608f9c3c156003e58a7985d534ac758f/pozafopawivepezo.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/39930432365.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/61843392704.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/najemogivujeviribeben.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/bonexofovenotowipe.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160fa737173a44---faguk.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983e37a0b63---finofogojumobinonubimu.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/popepukakezikudi.pdfIn PDF document text
    • http://dgjst.com/upfile/file/51782663768.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/djti9a88fg6ge5tntulrpd0n97/wazowafasanotesudevawix.pdfIn PDF document text
    • http://bruisedreedfoundation.org/clients/4/4d/4d9d7eec3bf3a09fa0457ace138f6a4e/File/91238292619.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/cd4thk7kqp2p0ri1lnjt073upv/zagugedusibekomubivip.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/be2a676277f2691885f8bc7323bf5cc6/dupudirunorefizerupaw.pdfIn PDF document text
    • 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_off0000ee30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE30 22508 bytes
SHA-256: f93cc03168fbf9f5a3b1391379e0cb1fd3f746be3ff44ae6ab04e109d0b8c638
font_01_sfnt_off0001288b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1288B 10568 bytes
SHA-256: 314c28c84874e7b615fe87e6877559a7099547d7a6b21bc85722fc3406123dda

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