Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cca7c7e9d1eee90…

MALICIOUS

PDF

76.9 KB Created: 2021-07-26 17:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1957784b9008a32859af5a595a47e483 SHA-1: 30ba85ae01aff161bb9c548d6ad286f3b906e5be SHA-256: 4cca7c7e9d1eee90f89421b1d54419b870b678574255d9f94f38034954a7e7e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8856

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://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/6j3ci41ekcsg67vsp8gmb7bh5h/30293357812.pdf In PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/81567726365.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/powabonebikakazuv.pdfIn PDF document text
    • http://cosmickino.ru/sadm_files/xejev.pdfIn PDF document text
    • http://pgpartyrentals-decor.com/clients/9/9b/9b45d36a3a4d562467d70d81bd292783/File/rifotot.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/ruxisukurozilaxe.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/xaluwarabofokerekom.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/eebb4b0365ab44ba6d23d63a86952e38/zenaxikufo.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/a38ee0fe07465d385b00df547ba98530/napiwi.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160949608520f2---67133108437.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/2nebf4sll8u8cmav482lktc43e/58542097784.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607813ef3248e---2084004604.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b099ddc8467---jikarilagumawexosinozigi.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/gatiselagiw.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/47360956210.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/55266162950.pdfIn PDF document text
    • http://better-pharma.com/images/file/files/29672969272.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609e917985d28---mukepabekewakogopirovan.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/bivakofinawubinovugovawut.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160fe1d8978ab7---zigenas.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/636bc7c94fee3ef1cf45c01f406d72a4/3518206448.pdfIn PDF document text
    • http://amdind.com/userfiles/file/xabojiv.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/3308372814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=azure+arm+linked+templates+dependsonPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A8 10788 bytes
SHA-256: 8b2bda143358deba12060bcdfb13070ee2cf93c6f690eeb305f726d6c94e015a

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