Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0d43215c5530b8…

MALICIOUS

PDF

56.7 KB Created: 2021-09-04 11:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 55239e430dd00a6fe7037e80983ae7a2 SHA-1: ffd86416e508c7e86d30544f1cb609f19eddbc37 SHA-256: 2c0d43215c5530b800dd174ab13ca4fdabfd6019f9cee2ed2acac1a1045aae96
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple compromised websites, indicating an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7352

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 https://wastran.ru/uplcv?utm_term=transfusion+medicine+board+review+pdf PDF link annotation
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/7e77d5c7ffcb2e8b4d2790ea0ff1f78d/48960740070.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/nebubofozajubenirumerisa.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/56205968600.pdfIn PDF document text
    • http://wami.cc/data/files/98779346001.pdfIn PDF document text
    • http://mankatomnclassof71.com/clients/e/e0/e0e8961458839910853a12af65841b27/File/62785992636.pdfIn PDF document text
    • https://mimpiindah168.com/contents//files/pufulil.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3e966d7b5---6298640874.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/zupuwizav.pdfIn PDF document text
    • https://steammining.com/userfiles/file/rogej.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f769ad9c0c---67355413081.pdfIn PDF document text
    • http://kp-technik.cz/ckfinder/userfiles/files/marofomigisudo.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/53956646457.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/66117711663.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/xoziwefuranunibemulakuwof.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/5kl5bgk0s10b8trg1h1v3tbflf/75155819846.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/tagitupasupirikopofof.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/3142118656.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/68011468460d3e55b3986d.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/83564820966.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607f24cdc62b7---lareje.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/mdo8fhap6l51tcv38ss3d484hp/8017089910.pdfIn PDF document text

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