Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f4abc4e7a9ee5d…

MALICIOUS

PDF

45.6 KB Created: 2021-09-24 09:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bab50b7c109f1bb20933d9f864e57dea SHA-1: 42aa24c0217bc4a6408de69dcd100b24085abe8f SHA-256: f2f4abc4e7a9ee5d29da8447ceed1c97a42fc0a509669cbe3171c701a700d431
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised or disposable hosting. The document body was unreadable, but the presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://jeneifogaszat.hu/cikkdata/files/6073134171.pdf In PDF document text
    • https://marathonlaval.com/userfiles/files/85302761299.pdfIn PDF document text
    • http://phucuongplus.com/upload/files/16571460196.pdfIn PDF document text
    • http://www.abcklima.hu/data/editorfile/51010840062.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/maparen.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/36896803165.pdfIn PDF document text
    • http://bulmarconsult.com/files/bedapezane.pdfIn PDF document text
    • https://ikima.fr/uploads/file/fififovi.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b5aceab8bf---kuberezazoju.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/0c72ee9667930a24f22191f085be3333/vetazoxawibabobufum.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/71690421211.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/vujinare.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/35213296875.pdfIn PDF document text
    • http://ensky-chemical.com/upload/files/wilitulediw.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/71220323734.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/koxogadesefef.pdfIn PDF document text
    • https://cyc-catering.pe/disac/userfiles/file/binapatuganeri.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/69326820427.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/76726022787.pdfIn PDF document text
    • https://omegaplus.bg/uploads/pages/files/watoduvow.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/6329231163.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614599152b2be---38501927155.pdfIn PDF document text
    • http://okudshava.ru/userfiles/file/bisilirugefovuw.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/jomowasokuvob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=fluid+mechanics+khurmi+pdfPDF link annotation

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