Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccffe8fbf83306ca…

MALICIOUS

PDF

63.7 KB Created: 2021-05-25 21:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ed6d8e8b64bf2bd53f41c745fbc0e0f6 SHA-1: c696f429aaaf6f5c7f6fa2acec7dfcaae3974655 SHA-256: ccffe8fbf83306caedea1d84c3a06c0d2fa6b64c5e5b4b26c33a23bd8a85ae93
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to distribute malware. The presence of ClamAV detection and ML classification as malicious further supports this assessment. While no scripts were explicitly extracted, the nature of the links and the detection names indicate a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8608

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://svingenieria.cl/userfiles/file/xurebegoxitog.pdf In PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/2a0272a2ab78c5ed567980e5b6b0ec11/16916411211.pdfIn PDF document text
    • https://actor-conseil.com/files/file/jikunutufovabukovuduzeger.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/649e331a37e0d253fb0a8bc9e4631f82/47279448516.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/pg69t2evc42ub8nm0j0n0tbri0/sujivegag.pdfIn PDF document text
    • http://adveotec.com/img/file/39727016768.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073f72990c08---72969806804.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609868ad83081---bitijusokerezididobi.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/34513365468.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/65ff5f24f2101d0c6890ff85379eaf73/89635782813.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/82751931342.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072aefb9024e---pikaviletonepeg.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/dk24s8h39s1lbp8mkdkrttv3b0/55923978919.pdfIn PDF document text
    • https://baongochoa.com/upload/file/96666613472.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/q04rj6jiuf8vvg07aou4l19cro/sivepebigusilipufena.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=xforce+keygen+32bits+autocad+2016+free+downloadPDF link annotation

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F1 5012 bytes
SHA-256: 7fc3e0ace314e6b088d84c12326032ff213657754cf9aa6ff9556d9721a0a232

Open this report in the interactive analyzer, or submit your own file for analysis.