Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f14978aae7f0647…

MALICIOUS

PDF

100.6 KB Created: 2021-06-13 09:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f94aa623d0f568810e07eaf2dba2f73b SHA-1: 0ac6c5c1209019c81aed0251b355efe4160af969 SHA-256: 5f14978aae7f0647b315321a213737197a4c9409dfa968311115b295954e069f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the heuristic findings point towards a malicious document likely intended to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9735

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://allytemp.ru/uplcv?utm_term=grammar+work+for+class+1 PDF link annotation
    • http://andlupa.com/userfiles/file/79517407016.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/clguf9tlquuilstp13keoecim1/likebanosu.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ede59304e6---bizulaxixefagif.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/7577d94fce45e06290932fe5f1b6a3f2/fukiberevok.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/dizaropuket.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/a187eeba4178f1fa927b7161b145d61e/jajet.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/gemafa.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc094e53ca---26638075708.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/80817946224.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b00dd363fd---26894417111.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfb7c5d8d6---91272764793.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/60698644761.pdfIn PDF document text
    • http://dgjst.com/upfile/file/sosudififugusivuj.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/jexixa.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/6r90rck9vns4ugpndipqt24ut3/16490446293.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AB9 5268 bytes
SHA-256: 3067ac7d89f0f7bed5dc9ce2d23d1a3a16da8cd5f48e4a6fbcc0bdb47e3283d1

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