Malicious PDF — malware analysis report

Static analysis result for SHA-256 c52d933ba2943999…

MALICIOUS

PDF

67.1 KB Created: 2021-08-18 10:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f633e4a3278a6842359b6f9a23f4b8b6 SHA-1: 090355e1fd16b80f9c7b8a51b10ee460b3fc10d3 SHA-256: c52d933ba294399966292cc6852c33160859a426cc74e510d7085d06beb99103
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7837

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 http://volkshilfe-ktn.at/images/content/files/jakadiwazamunur.pdf In PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/borufajomojujunozobilite.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/56963612193.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/44e7525336c8bd8993ab66b627e98639/motoraf.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe778b385ad---rafewemetorujopiv.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe2374b2f9---wunitupuxodalelutewivaz.pdfIn PDF document text
    • http://boxethai38.com/upload/file/zugidi.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/15906320061.pdfIn PDF document text
    • https://soechi.com/userfiles/file/minedelebumomikiterajupev.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/sonezuvowitewalememema.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16075154777797---90007018741.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d31fa1969---nubunasesezivijos.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/tewufo.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/9kki02v5pgpa93hqv9qg7vnucg/jefebupexiw.pdfIn PDF document text
    • http://pcwest1980.com/clients/9/9b/9b13e9c1eb96aaf026ead536bb80a376/File/25711630285.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/18298037838.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbd5b131f9---25271050055.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ralifolotuzopajapudodot.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/8f8826b836cc45e43c4a44e1cd2aa464/jafume.pdfIn PDF document text
    • http://hanifeugur.com/image/files/53022264544.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076f41ced587---batagukut.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/53905198762.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/5582a5b50651ac4df6ff78d4816feb13/zalixijepaxiwidenijobut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=leetcode+book+complete+edition+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FA 17832 bytes
SHA-256: 41ef3c889e6bd711059424a6db7e722a635cea4d0828ba16deb3e952e18a9095

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