Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e1bb4b8a3f6d4e…

MALICIOUS

PDF

64.0 KB Created: 2021-07-02 01:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: cc63772514c11bee61a2721a5617c778 SHA-1: 729cc009f198f43e054dfec6cb72aa02439e4c5a SHA-256: 72e1bb4b8a3f6d4e415737bbc09a0ca7b397b96c7eee1f45b90aeb1a4f802ac6
154 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 functions as a link farm, containing numerous URLs pointing to compromised websites, likely to lure users into downloading further malicious content or submitting sensitive information. The presence of external URI heuristics and link farm indicators strongly suggests a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7281

Heuristics 5

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=symptoms+of+malnutrition+in+a+child PDF link annotation
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d008ec0d36---25788551963.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/np2srlq7reeqm73pf6r8squh1j/tekisumona.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/62017563085.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/ramagelawezixa.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/58f8622ad3e3317ff79ebac38f0d49f1/fejotefapusubewijigar.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a30b8e264ca---pawided.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/4dacec86126b52427b27a96e9ad59b98/ledefudagavez.pdfIn PDF document text
    • https://soechi.id/userfiles/file/34620166182.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85511d116f---82832504300.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/3a013c9db93b8197add9003f453ac924/69849220943.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/4ji380118efm8dhui417lu75t3/73544422844.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085b97b7f96d---lemaxerupijedutobeduxa.pdfIn PDF document text
    • https://ip-kamera-rendszer.hu/ckfinder/userfiles/files/96869793253.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/380b58cbd356ea61bdc2927f57c72a84/59767857577.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/88743316871.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/53464465057.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecd50311b4---vesij.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/rozes.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/fdbbd001751e8b8b0d991ba0999b2576/24249188857.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c63a4f9c0---85983529653.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/032336dad89b6f8069cfcbf85fd2339c/sapujavuzam.pdfIn PDF document text

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