Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b3fbd05d19d03f3…

MALICIOUS

PDF

64.0 KB Created: 2021-07-29 22:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 4f13952f55897f27766f99b152a31bf9 SHA-1: b21b0409aeedc2aa86368675458ee3f1b7920a24 SHA-256: 2b3fbd05d19d03f38e3f88416388ee8b30005a45d2832936b9848a62e974205e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content or phishing pages. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a malicious intent to lure users to potentially harmful websites.

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 PDF link annotation
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/809325ec6bebaf5a87b4eb279fdf64d8/8598780788.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/warej.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4cb46156b5ace7322d28fa2eb62cdd25/89855084381.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/pisetidimowu.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/704tk25jjh742lgl8h4bsqbtko/gifadasubobir.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160855eea63c01---15104279926.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/77391956364.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/nogoju.pdfIn PDF document text
    • http://hkalc.com/userfiles/gosolido.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/wibaxijagezudi.pdfIn PDF document text
    • https://coherence.cz/userfiles/file/10130853014.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/wevetusowidakidakanive.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/sevfagmg0bos5fi218rb9p96l3/57015653960.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afa9855cfa---buzojevezepavixipifutaw.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/69684720178.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/vaburupu.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/80640569653.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/79788211579.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/30255679072.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f3a9c443142---dikopibalijeker.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/elmvqu27k3fooo0c1gv7kooac6/60471339036.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/14d0db38be1746fdd7fb236440e80ba1/64055674542.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/susipilamij.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c34875a90aa---jofurapolixafipaperen.pdfIn PDF document text
    • 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_off0000de35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE35 11224 bytes
SHA-256: 2abc28042f06cdfef90e973a7b725f43b8d70ce64cf1f9ff9e09eee60c7851bc