Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54ea2622dbba1d5…

MALICIOUS

PDF

51.6 KB Created: 2021-06-19 22:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2f91f871688f90aec2bb46effc00e49a SHA-1: da6ea64573aeb728ef2f16fc16a41febb625c163 SHA-256: f54ea2622dbba1d5f9fd5ffff738ad6ebfbf4ecd45f6a702fb6bf8d1a6d3b39c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, some of which are associated with compromised CMS uploads, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7129

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://thaoduocquyhiem.com/userfiles/image/file/wafim.pdf In PDF document text
    • http://samafb.org/uploadfilefiles/wegomisasi.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/kulabidaduborabil.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/50016491651.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/bqsklovvprsp3shjudef7qae45/zegosotogelufupog.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ad71e10c6c6---xokevodusogemujinof.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160885f91526d7---timefala.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/kogavuwikedipal.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e79c659c1---55219426384.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4cad341c5---26966821469.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/460b178b1a7ae227d5ceaa38c5f4c1e4/javikewuxam.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/86722475874.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/xivefifa.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/38372756838.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a037ab0a0---vaxugolu.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/13123893704.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce47211f4d---84039379741.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=marrow+mod+apk+latest+versionPDF link annotation

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