Malicious PDF — malware analysis report

Static analysis result for SHA-256 34780c5145b95901…

MALICIOUS

PDF

84.6 KB Created: 2021-07-29 21:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 64ee9fb31ea28f4225b2bea3b2ec8cb3 SHA-1: 3e0d037652c5974d4a9d48e3f8e8a8fd2893e06a SHA-256: 34780c5145b95901a4ca50bd624106f86cc289a3839d25d03fc3fb8e73489c95
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a link farm with numerous URLs pointing to various domains, some of which are hosted on compromised CMS uploads or disposable hosting. The primary purpose appears to be directing users to external, potentially malicious sites through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7998

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://sport-jicin.cz/dokumenty/ponit.pdf In PDF document text
    • http://kipia-nn.ru/userfiles/file/vepujenatufoj.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b01d49f26ac---16677203600.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a273dbb6de9---neluvimejib.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f17988a4d5---rewenoni.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d09798c09a---84812483577.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/6e3e259b98dbe113868c74bf9b7e836a/22925102868.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/rojufojelefegupuzus.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/nines.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/97a35f627bb052d1a9e6f3a00815b0ff/robusuvilaluri.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/gonixelopuzejikivi.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7357055d14---tiburabewekumewobapusu.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/df5ec06892b9f046ddacc0a38344865d/xuvam.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/dezem.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/3ca39c012c8f8ac5d18668ab1ff3a5ac/84624180690.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/036c29a7b3be33fc4159f722d65d3709/10662557686.pdfIn PDF document text
    • https://tavio.ru/files/file/gademobaxuvemod.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/rokiwiw.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/34365999609.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/fqndjs0nsj8tl2n1187se5jj7e/diperege.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/9o5r83fq1cuf6p1n7c7tjd3ouc/83996348419.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c932eecf4---zogopawagazex.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a59e5d36ccc---neduradinufuzekonet.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160786a0b5389e---julagipakasaf.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c549784c3f5---34813600072.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=dua+qun%C3%BBt+witr+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000136fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x136FD 13210 bytes
SHA-256: f53a4cad4d5023dde6f5ef291c26ba6886b9bfa479f3afb9b150d487c680b6f1
font_00_sfnt_off00011f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F77 10480 bytes
SHA-256: d22bce1cb838a944d08c05ff5ce5463c5822400d32c44199d79f6b50c1abfcec