Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5180dd7a837b4df…

MALICIOUS

PDF

76.2 KB Created: 2021-08-12 06:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4123f86509746103b5dc3982414905bd SHA-1: cbd7fdd6c15af52a55261b469e70a96d0d2a41e0 SHA-256: b5180dd7a837b4dfc796c02c11e014eda0da2ee5b0d7e03b3a396717612054dd
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The presence of these links suggests an intent to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9691

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://laborke.ru/uplcv?utm_term=queen+size+bed+ikea+malaysia PDF link annotation
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4646c0888---koxuk.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608e87ecc6edf---rememonezuzovovodijagirep.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/lutelipuzuguwu.pdfIn PDF document text
    • http://m2m2design.com/userfiles/26867458650.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b1e59a740---20401313545.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/g22nn22fsfsgm062ue0npjj884/mixozalazokitiked.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160768376e3b38---56497084723.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/29558879999.pdfIn PDF document text
    • https://altbuket.ru/files/donoraxuzawatizelarupone.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608abe8303ca9---dowunopaf.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/apgn32trhtalskoeg7uemqs2ce/xuxudaxarebezedakepeko.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/6feaad309ece0f2bbca0de1a9643f66a/saluwif.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fe7a5532ba4---ginetukezakimezalaxo.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/noxusa.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607959e53ba79---wokegofasigobetizijig.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/30621151089.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/vowudadik.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/limesojolexepok.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700d53cf5b8---25703078224.pdfIn PDF document text
    • https://kocarbon.vn/luutru/files/24712084857.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/36835029243.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d65d34d2a1---zebonikaf.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/niwakenawifase.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/sirasolawokuvewugebagip.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f375a1c895a---997602089.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_off000114ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AC 10656 bytes
SHA-256: 5b385a59e4f6b4bb07b015845c092a3205f3ffadd7297e21fef940355ae0e01f

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