Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac8a884a6aa722a…

MALICIOUS

PDF

71.7 KB Created: 2021-09-19 09:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f5eaa71e3e2dc605a7aa14cc07848bd9 SHA-1: f2d4400c777eed8a3aeeb6ef794f12a2e3a588c6 SHA-256: eac8a884a6aa722aa1a7c6fde8296a022dc09176769996606993d7e237a20f43
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple distinct hosts, including compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the final malicious destination. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely involving phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6686

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=how+to+turn+off+touch+screen+on+android PDF link annotation
    • https://aedwea.com/upload/foto/79842923266.pdfIn PDF document text
    • http://nordicwalkingturak.hu/_user/file/sajemokodipipeki.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/77923140774.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/kiduk.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/kebovebov.pdfIn PDF document text
    • https://cfbadalona.net/ckdata/files/mimexopinasudepajo.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161439fefc6a83---fareruwijetumijixipigi.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/lobamidalemizimugefomiv.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16136640a6fffe---19151299908.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/30904891712.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/sinitulopavov.pdfIn PDF document text
    • https://www.natursany.com/ckfinder/userfiles/files/93239488561.pdfIn PDF document text
    • https://soenen-pneus.com/upload/file/notinesotawusiki.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/13618634455.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/dewupodokiw.pdfIn PDF document text
    • http://sakulchaiplace.com/Uploads/file/44683354404.pdfIn PDF document text
    • https://www.solucionaesp.com/ckfinder/userfiles/files/60988998199.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/35532394065.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/70276073309.pdfIn PDF document text
    • http://tajilin.com/upload/files/31010084407.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/24760769616.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/68303710585.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/zevipam.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba758f1687---juvetifitixopogik.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/835807a8d5c278f9d6fe9d4312c260dc/40806852016.pdfIn PDF document text
    • 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_off0000e022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE022 17968 bytes
SHA-256: 178d3221533f41aace0aecb3c8822dc0c10d605bb9360d9dfb68eeed543a125e

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