Malicious PDF — malware analysis report

Static analysis result for SHA-256 425e7c1d1a563297…

MALICIOUS

PDF

55.4 KB Created: 2021-09-21 07:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4a87b40a338e6e286e470aed16a6f0a2 SHA-1: 6e3de131a31e376559f07518e9a9937c72154dd8 SHA-256: 425e7c1d1a56329703b0238446f8ab207207d37468683a5e6f2a9684928e71f7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to mislead users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, so the primary attack vector appears to be the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7201

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 http://seattledesis.com/fckeditor/file/67261085454.pdf In PDF document text
    • http://4x4autok.hu/userfiles/files/97845179904.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/45283712956.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/subevebegoberikavuwa.pdfIn PDF document text
    • http://barahi.com/assets/userfiles/files/noranatafikofifemat.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/87737600496.pdfIn PDF document text
    • https://mfdesign.hu/files/file/67428004475.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/73189388768.pdfIn PDF document text
    • https://viceda.com/userfiles/file/40856437874.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/jitataxopaxupetakogabi.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/28790191041.pdfIn PDF document text
    • https://thietbixanh.net/uploads/files/batidajonolorewovebun.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143e7ef390e5---duwuzojikosurimuvokatov.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614680019da6e---dufinodikagebojumox.pdfIn PDF document text
    • http://fge-service.com/userfiles/file/53976284423.pdfIn PDF document text
    • https://bevillelecomte.com/ckfinder/userfiles/files/pijixofezi.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16141f90b729ff---pidixufe.pdfIn PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/73918772816.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffbe5adc34---78212475207.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///gitewabuve.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/ropupifixowef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+root+xiaomi+mi+note+10+litePDF link annotation
    • https://mediaget.com/userfiles/files/wejerunupiwis.pdfIn PDF document text

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