Malicious PDF — malware analysis report

Static analysis result for SHA-256 066ef4a3cca11e86…

MALICIOUS

PDF

80.6 KB Created: 2021-09-07 21:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 46c4d63929b9e0c9a13f0de86e543da7 SHA-1: d5dc92e5a05ea6680389deaa822213153183c694 SHA-256: 066ef4a3cca11e86cff97c05406ce8ffaa26d42872918d45f9c8d041f2e7262d
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6957

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://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/062504f19d5ab7b8250b2c86fc0dcbbc/47632535803.pdf In PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/e10a7566dd8f2156466fb1d22962cb14/woturumabifewopu.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/8243082648.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/5314938731.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/2a39880e270ebad5092043b11a9cbe29/66773811213.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/larizefimom.pdfIn PDF document text
    • http://hzqzg.com/d/files/fabizexen.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d164f2eb76---danokodilagosap.pdfIn PDF document text
    • http://iltorg.ru/upload/file/77769259293.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/41220261249.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d67db3e8cb0---51556585941.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/7lu6iehs3fjj6nt3166qe1fj11/12494331182.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607caa8b86775---12643713490.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607729a0d0b40---86764979461.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889279b9c89---wumizupeleme.pdfIn PDF document text
    • http://iqlacpro.vn/emotive/upload/files/66319449079.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/guvawafogifubus.pdfIn PDF document text
    • https://digireg.nz/upload/95545767858.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/2967950a3e0743c5874ee7873e6e8032/14023857632.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160904a4086efe---davobilasezowogosikunonaj.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/59382039129.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/jrudvmrqhee1jrer9fe2lpb4qc/28241708195.pdfIn PDF document text
    • http://www.climatisur.com/ckfinder/userfiles/files/53857234631.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c9130f534---54203129905.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=onduleur+monophas%C3%A9+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
font_00_sfnt_off0000fb5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001136e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136E 21116 bytes
SHA-256: cfbd3f3accc7b993a0054f20735bcac514b341d4b00879fff054210513695030