Malicious PDF — malware analysis report

Static analysis result for SHA-256 542cc8e4f79e23c8…

MALICIOUS

PDF

72.0 KB Created: 2021-09-07 15:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dd2fca4a3f21f0eb1a533d4eab0a1946 SHA-1: 0de336a5ce46ed1081674b020db1f589724c2890 SHA-256: 542cc8e4f79e23c8d5890867b12e711c357ecc65ffa62bda77f0669bc0beb981
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of external links and the overall heuristic profile points to a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6220

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://arcomproltd.com/userfiles/file/58543287260.pdf In PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/5521d231d7f59cd7a63ae2e5175f0c89/68535273338.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddb3cfabde2---fawogekudabiza.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/tofefibusek.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/195efbff19374bbed5befe7e2b4c5c01/lesogupiwekonowanil.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/4986887092.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/74249014164.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/8td0bajr2uf089i0nti1s1opn9/44561179431.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/75484687347.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/18kcdq8v3eeck971442elvc348/9522044797.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/4sm6440qk3fslitmji4jn5mttf/wabagiwulukaxivodokotafix.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/0114b0126e50c3a79a0b6746378b5c17/91960704993.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/62010340699.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f035d5b43c---fegobaxipifitunaragisu.pdfIn PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/kotoj.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/ba46269f2cec1f39c445257d922254a7/39330405749.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609770d558b70---mevupababubilununabiz.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/zururomaxufudi.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/51231470429.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/70517312477.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160829e8fc0ba6---12757838523.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607af1311d0c8---24408562958.pdfIn PDF document text
    • https://dongphuchuytai.com/upload/files/27781928072.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=godin+multiac+steel+duet+manualPDF link annotation
    • 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_off0000e380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE380 10568 bytes
SHA-256: 9da5d9582d819518f798f4d503468f098a6f58c69253f8dd8ab0c66b757b50d4

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