Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e84005e6338d36c…

MALICIOUS

PDF

64.0 KB Created: 2021-07-23 16:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d610c270a9fa84cdda88721fdeb34bf6 SHA-1: 47d63f384ca64654d2e39d4f0bea4c2bd797b0a9 SHA-256: 8e84005e6338d36c1e6e2f232894cdcd36b674c689ced50d50bde7445fc925b3
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains embedded JavaScript and a link farm pointing to multiple external websites, some hosted on compromised CMS uploads. The primary purpose appears to be directing users to potentially malicious content hosted on these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9430

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://stadiumhighschoolclassof1965.com/clients/0/00/0080f9a3d0f10e930bcfc39f0a940e94/File/57698985166.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a99d3b86fb9---23370564402.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/f78e94bef47756ee047a5cf6c3cfb73d/zivikazonigofivawob.pdf
    • https://a2designbg.com/userfiles/file/57166612622.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/e0b7dcd1711538bf7403f8e3aa456dcc/kudatokimab.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd001924f6---peral.pdf
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/9u05mok7p5onpouj9hturdjpe8/nerovikipixa.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820aacdadb6---togibitivotejazelado.pdf
    • https://roweryelectra.pl/app/webroot/uploads/file/16265314145805.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16073c29aa43e5---jonolesosituvix.pdf
    • http://rw-hse-businessconsulting.de/userfiles/file/zuloxuvufugobubujad.pdf
    • http://splogservice.ru/content/file/nizukejewum.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac7aa43090---basotigusofiwiduditubakag.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f556f9bb578---nuxamisadimowojazore.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c86c7eea0---kusozifibuxekasujoxep.pdf
    • https://gitedu.in/ckfinder/userfiles/files/gajasudaloped.pdf
    • http://www.idukkidiocese.org/files/js/ckfinder/userfiles/files/saxefazodemamavixogifeka.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6e1529370---rituwe.pdf
    • https://infotechb2blite.com/bot/ckfinder/uf/files/80695803941.pdf
    • http://fdscience.com/UPFILE/userfiles/files/13750648269.pdf
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/vikilimav.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/j3bfjabrtplqsnc7bdrs5glspv/bapemifegowexewamajop.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/5b5c3a7a7ed6c10fdac291e4e478406d/43436070633.pdf
    • http://archgeo-leszno.pl/uploads/userfiles/files/3313250862.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+can+i+trace+an+email+address+for+free
    • 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_off0000dc9b.bin
63c19378eda7ecac6d219ad7a0807404433a72c453753600ef2e0defcbf23233		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9B 16492 bytes

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