Malicious PDF — malware analysis report

Static analysis result for SHA-256 e491357327b5a00e…

MALICIOUS

PDF

77.6 KB Created: 2021-10-07 13:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: df7cbe392ecf13eb012ed311e69d0f11 SHA-1: bc39243c40c6d95cfd8c7febacc162b39bf36d5e SHA-256: e491357327b5a00ee7e42c795f3b9949254f0be6971e8d7e2b52120e0ccb6a19
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. The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to lure users to malicious content. The presence of these links suggests an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://irlanc.ru/uplcv?utm_term=common+bile+duct+cyst PDF link annotation
    • http://s2ipower.com/survey/userfiles/files/47627669673.pdfIn PDF document text
    • https://ms01bet.net/contents/files/14223543842.pdfIn PDF document text
    • https://giaphutelecom.com/tctt/sites/aaa/file/nakoxegobajiwafilogiza.pdfIn PDF document text
    • https://homestayhoian.thamtuddt.com/uploads/image/files/ketidobilenonob.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/9be3d4d528b372a89b431551e66a8350/vowomafedewepet.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16147787cc348b---61010719055.pdfIn PDF document text
    • http://exms.fr/sites/default/files/file/xeganizexe.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/vekex.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109050311597921.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/53564714543.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/9843246778.pdfIn PDF document text
    • http://maihome.hu/admin1/file/38896847382.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021092216590473499.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/72962123082.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/rurukupomorolirijajazabi.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/6152a66fcfacde64ca50f62a457982f2/98225003336.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615d7cad58cc5---33335784875.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/davotulegamabepabifi.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/19568187239.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/bba0071f81252e32309b182a138c7ad6/waniwumubikun.pdfIn PDF document text
    • http://miyagi.chi-kara.net/Upload/files/96082977176.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/7qc3msuiq8mfsnop8ko9g9ttqu/90128805505.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1613f939f07002---51437493025.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/zamirirokizom.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/pozalusojulagebafava.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_off0000e77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77F 17708 bytes
SHA-256: 53505475725afea4601bdf36259f35c6d4c805322b3d445ecb4e36e9df503be2
font_01_sfnt_off00011523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11523 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1