Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4dc7362c85b56a…

MALICIOUS

PDF

57.2 KB Created: 2021-09-01 08:37:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d836cddff347687451b5c9f28ce998e6 SHA-1: a9bf627fdacbc18af645aeddd37179d360d7aaaa SHA-256: fb4dc7362c85b56a78173968782a445edee0a1fafbb1bd1b556728994a3bfaf8
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and link farm heuristics confirms the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9538

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://infrive.ru/uplcv?utm_term=no+objection+certificate+pdf PDF link annotation
    • https://chetanaus.org/bheru/uploadfiles/file/56044981093.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/1129449811.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/vei86lb4bqp1mv9ogl4e07g22f/tezukexaxexaxaz.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/15027770967.pdfIn PDF document text
    • https://krossi.ru/images/content/files/piludipovilisol.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/veluxafas.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609f318ba0b7f---12781248561.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16103b1fc301d0---nadinud.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed57de99f4---jipixebizoputitiko.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/43445395899.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/56380637577.pdfIn PDF document text
    • http://adriennemason.com/assets/files/67632613785.pdfIn PDF document text
    • http://vietsinphar.com/uploads/files/36518097370.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/2530cd2ffe4c2dfdb4ac11b508d4b56c/18565480729.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/22721072728.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae011c470fd---4336315105.pdfIn PDF document text
    • http://bacvietexpress.com/upload/userfiles/files/garazesamenisurub.pdfIn PDF document text
    • http://toyotarenta.net/FileData/ckfinder/files/20210724_0FBBF8E10574A0F1.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1611af6a3eec12---67500033198.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/ravak.pdfIn PDF document text
    • https://cakkue.com/contents//files/saboxanovovafilolubedi.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_off0000bd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD7A 10648 bytes
SHA-256: a0b3ce4694417aa1a7d5afab2ad7cef96b2119dbee0b784a133636b02e771e01

Open this report in the interactive analyzer, or submit your own file for analysis.