Malicious PDF — malware analysis report

Static analysis result for SHA-256 a31059e0869e658b…

MALICIOUS

PDF

99.8 KB Created: 2021-10-06 23:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: beccbf1f6fe5d73df466ac060316a777 SHA-1: bdf93dd444cf4f69c5be2c30c51bd90754585b81 SHA-256: a31059e0869e658b65bbd967588c721c7e6113063929a4b138ab28ea8e3bfadf
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many hosted on compromised or disposable domains, indicative of a link farm used for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The file's structure and the presence of multiple links suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.1206

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://archism.ru/uplcv?utm_term=army+of+the+damned+dnd PDF link annotation
    • https://ilexgold.com/app/webroot/files/userfiles/files/zekoba.pdfIn PDF document text
    • https://basisnomor.com/contents/files/96110385031.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/jevibepotovedavi.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/94703774038.pdfIn PDF document text
    • http://miass.realxenon.ru/uploads/files/31558264222.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/789899284.pdfIn PDF document text
    • http://creationart.hu/files/file/72839478676.pdfIn PDF document text
    • http://slezanie.eu/userfiles/file/73456352951.pdfIn PDF document text
    • https://partnermind.cz/images/files/feduwawarukuveril.pdfIn PDF document text
    • https://dyaa.club/uploads/file/28397834998.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/14871309582.pdfIn PDF document text
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/dubanodedojow.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/161581ff6b5dc9---tikerozepuvuxatexidixaxux.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/41397147256.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/161420e7f4b0cb---robeburozores.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613077e46d2f8---52764762969.pdfIn PDF document text
    • http://thecargonepal.com/userfiles/file/51243047528.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/43886941261.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/kolixudag.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/02688d033f1afe75ee0dcd7a62ef683c/23176925280.pdfIn PDF document text
    • http://tarasovfabrika.ru/uploads/file/tazupeduxonatazeviwoteg.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/8c80c6601bbd709cd75f4acfbc425022/76827010626.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/xawebagov.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210901_89EA89F8AF63102B.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e03cdc4b55---patur.pdfIn PDF document text
    • https://miminku1.com/contents/files/gepevulalopesadulirosad.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_off00015a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A33 10408 bytes
SHA-256: f21c0decf39cf7d9f01769cf22a3f5af446be8adfd3405554cf590165cbebdc8
font_01_sfnt_off000171a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1