Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ced767c179aeb7…

MALICIOUS

PDF

89.0 KB Created: 2021-09-01 14:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ea5b1464e4eea13c729b95e4bffa35eb SHA-1: 593988f8dbf0bce4a335fd59ee6f0ce556b6feef SHA-256: d3ced767c179aeb7b2422dd2d6e1b52f27e3859cdfd66d7d54bfc51c158e2cd6
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting. The heuristics indicate it functions as a link farm and potentially a phishing lure, directing users to external content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for distributing further malware or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8552

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://medvor.ru/uplcv?utm_term=what+religion+were+the+mayans PDF link annotation
    • http://didocrosby.com/imagenes/file/vijogi.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8697d1955d---30002981117.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/ravorimukeziwak.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/wupezonofotinurami.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/76457624752.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9136b3481---13010303932.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/jurojuwasaligufuwinezoke.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/32972309463.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/vebizuvozalutaralezivapux.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/abb71f1db4f2822736e3b5f26f1a06f0/kelofokixavogumuxatabut.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/zavedaliv.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16086dd640e8aa---16376254711.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/mavubekapudijafaki.pdfIn PDF document text
    • http://qianshunqs.com/admin/upload/71615906842.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/49036301551.pdfIn PDF document text
    • https://www.upperhousedev7.com/ckfinder/userfiles/files/44744101086.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/dedugaduzilumifarugid.pdfIn PDF document text
    • http://esistore.de/userfiles/file/59405410608.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/50818949651.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/32490921750.pdfIn PDF document text
    • https://webhosting4.net/media/file/guwizijekamaxojame.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/13be51957efde7d8ee8228e9cc129dcd/6939729760.pdfIn PDF document text
    • http://dkkarsin.pl/img/upload/files/juxosatadamifesevetizupib.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe6483b5fb---rovodezorafiga.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_off000109cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CF 18788 bytes
SHA-256: 2eac420745f4089133a34e1a80783ecfa3cc799919b04b3f679f4489ef85b744
font_01_sfnt_off00013a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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