Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1218e716b3f739…

MALICIOUS

PDF

62.6 KB Created: 2021-07-29 22:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba5798a44cdd99e907c9cfb4ad77df6f SHA-1: b466756c96c91ab17e9b9a4497b0e9c62f290a3b SHA-256: 6a1218e716b3f7394eb70789a5aa392e15f0fbe4e1203feeb68a4b14c124bd33
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9169

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://crysiq.ru/uplcv?utm_term=o+pr%C3%ADncipe+do+egito+filme+completo+dublado+hd
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/809325ec6bebaf5a87b4eb279fdf64d8/8598780788.pdf
    • http://www.herbertvanderbrugghen.nl/draft/warej.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4cb46156b5ace7322d28fa2eb62cdd25/89855084381.pdf
    • http://hz-karavany.cz/ckfinder/userfiles/files/pisetidimowu.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/704tk25jjh742lgl8h4bsqbtko/gifadasubobir.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160855eea63c01---15104279926.pdf
    • https://habibitours.org/ckfinder/userfiles/files/77391956364.pdf
    • http://megaprestige.ru/uploads/files/nogoju.pdf
    • http://hkalc.com/userfiles/gosolido.pdf
    • http://papaicountrylodge-longstay.com/user_img/files/wibaxijagezudi.pdf
    • https://coherence.cz/userfiles/file/10130853014.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/wevetusowidakidakanive.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/sevfagmg0bos5fi218rb9p96l3/57015653960.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afa9855cfa---buzojevezepavixipifutaw.pdf
    • http://phuocthuan.vn/images/pic/file/69684720178.pdf
    • http://guides2alpes.fr/uploads/file/vaburupu.pdf
    • http://deborahkay.com/ckfinder/userfiles/files/80640569653.pdf
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/79788211579.pdf
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/30255679072.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f3a9c443142---dikopibalijeker.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/elmvqu27k3fooo0c1gv7kooac6/60471339036.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/14d0db38be1746fdd7fb236440e80ba1/64055674542.pdf
    • http://etasystem.net/userfiles/files/susipilamij.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c34875a90aa---jofurapolixafipaperen.pdf
    • 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_off0000de35.bin
2abc28042f06cdfef90e973a7b725f43b8d70ce64cf1f9ff9e09eee60c7851bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE35 11224 bytes

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