Malicious PDF — malware analysis report

Static analysis result for SHA-256 01566ff06b3b6457…

MALICIOUS

PDF

62.3 KB Created: 2021-10-04 16:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 73cfe9c01b5924261d9f69fce672a027 SHA-1: 63e00be6829033164ea5b650eda59b21e882e1ef SHA-256: 01566ff06b3b6457bc5bab93035150df2081f385737fa0a3a61f9fb6512acea5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of these links suggests an attempt to direct users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6921

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://duhocblueocean.vn/ckfinder/userfiles/files/89405592071.pdf In PDF document text
    • http://oskarmak.com/userfiles/file/rugigowigujatasazeki.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/pipenemexugajifutivabuve.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/sinezuzijoxulerisugatex.pdfIn PDF document text
    • http://sinojjacob.com/userfiles/file/gugoxobuvasoritugajevu.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/4313812925.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/53686282633.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/59462717862.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/22448593524.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/77781737080.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/sanavenidiwe.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/lifonogiwumugebusazumepeg.pdfIn PDF document text
    • https://karjerastests.bankai.lv/ckfinder/userfiles/files/pasog.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/f570387564d7ee08a8eff62c68c93530/mebamimugibena.pdfIn PDF document text
    • http://topflexsports.com/uploads/nemavorelafudezofuriso.pdfIn PDF document text
    • http://xn--38-mlcqjbufcz6h.xn--p1ai/userfiles/file/dejavivofukawomulupame.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16132817e31743---56499084430.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/dewojep.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/tvvlftatqfdr2kmol4pphf11f7/mujutuluvavikokufufoxa.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/zabiredasipudeje.pdfIn PDF document text
    • http://sdv.sk/userfiles/articles/file/wipakumiwejuvijijif.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/bexaxeleroxojaporapiwafi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=persona+5+king+frost+weaknessPDF link annotation

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