Malicious PDF — malware analysis report

Static analysis result for SHA-256 a237233e9fe34ef8…

MALICIOUS

PDF

52.9 KB Created: 2021-09-01 06:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c7df9638799161c43d7804ae0afe4024 SHA-1: 434576838e69ce593885053334e938112f9f37d3 SHA-256: a237233e9fe34ef821e4ce51f5bdca779b22ad0ee7fd0199c23349f5926f6fa8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to manipulate search engine results or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8076

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://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609c391b14c18---mojuf.pdf In PDF document text
    • https://planet-for-events.de/userfiles/file/vabolakodakifopafeloxodo.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607468f664027---39219190067.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/libefunuzetefafazozadave.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160769ac09d8f3---titaxiw.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/zikorupupimex.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607524d66a8ce---lebitod.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5093bd6e5f---17123162694.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/kebojulegotulenigezijo.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/67216147703.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/u0isgv8cv6nvo1i179374tan7g/totusikevibez.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/2vip12jci60d1e4e80j24ivnp5/21547465550.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/5382876bd190f2d9ccbe799805e2c846/7610840161.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c41a3fe2004---matogolepab.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/142101342147.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/5398904741.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/ridikeme.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/dobinenarago.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/pawafopoduja.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/16777022316.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16095ffaaae4fd---66375414799.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/54562488603.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/2ff9e3dd359d4344e2a370aeb195b88a/bonumonujumamodoxa.pdfIn PDF document text
    • http://70sromans.com/clients/871711/File/vaken.pdfIn PDF document text
    • https://desense.eu/uploads/wysiwyg/files/88934842065.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/dasimejuxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+get+iphone+in+freePDF link annotation
    • 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_off0000b7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1