Malicious PDF — malware analysis report

Static analysis result for SHA-256 01325323abb6d2d6…

MALICIOUS

PDF

70.2 KB Created: 2021-09-04 14:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4563cd5dc9adf5939ba746bbab759bba SHA-1: 66bf4a09f0597507412d9694f0515fc6101a2db7 SHA-256: 01325323abb6d2d62a66fd1c176a86d52fc3116bf6fe070524aa229a4c58adac
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns suggest it's designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9130

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://medvor.ru/uplcv?utm_term=mandela+coins+price+list+2019+pdf
    • http://messtores.ca/fck_user_files/file/vedejatupufugu.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/276794aa593c7fadbdfe875930a3dd0a/91476413248.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/luemv8hjpepsl498eqn0m6ljm5/pobuposape.pdf
    • http://geofer.eu/userfiles/files/57295323465.pdf
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/59974331155.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/331c9774c590c8d5f152026d7c043c04/77074535316.pdf
    • https://menu2uplus.com/images/file/76992127915.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/fa6q2fk58ro1p0u47vt3pd1bp6/ludixuni.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/mconqsitshiuihos4osrm7t4nq/xulowekexi.pdf
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210831161155.pdf
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1af70852ed---modizawibebefurobuzalod.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611eb107dbe6e---xilufu.pdf
    • http://synhbio.com/upload/files/88525805961.pdf
    • http://spbi.cz/res/file/62838601419.pdf
    • https://sabresources.com/FCKuploads/file/zobisosurejovewoderinol.pdf
    • http://fishuntpesca.it/file/jinisusovebubugoku.pdf
    • https://vayoto.vn/userfiles/file/sedobufuse.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607827ad3f2b8---11656774772.pdf
    • https://andhimazhai.com/images/files/15924958043.pdf
    • http://highlandlynxotic.com/clients/7/73/73cf6ae24f8ea70eb1cbac1dff6b0f9e/File/gilomuwunakufijodaluzubod.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/56bf3at49afflqhceo1kp83a73/zusigolefumawerekise.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/4874935535b806f9c78f019b2a87198c/guduwedigofilar.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/46ae21nddfdsuf253n1kfpjrf7/16105833846.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffff754342---bijuraxajinamoko.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3fb.bin
2e4ef34d8abf51ea668f312a8c1160a2707afcda0c4d7c191461f4bbc3625e40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FB 11068 bytes

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