Malicious PDF — malware analysis report

Static analysis result for SHA-256 f41ec455ea068a8f…

MALICIOUS

PDF

63.6 KB Created: 2021-09-12 16:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f0df8fc514c8478e0a99d8baab897ad3 SHA-1: 84bee33bac0fe558ad9d3fb29850eb8340b66016 SHA-256: f41ec455ea068a8f09e8b59df59d40dc5cfd0e27b653607869dbfe22d8f387d7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. These links are likely intended to lure users to malicious content or phishing pages. The ClamAV detection and ML classifier further support its malicious nature, indicating it's a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7061

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 http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382f54b35b0---5240632195.pdf In PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161360ebc45044---pekidekisunox.pdfIn PDF document text
    • http://www.valaisconsulting.ch/file/57286641409.pdfIn PDF document text
    • http://maxbrio.kr/files/files/5154149368.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1c8024bce---jixumomejidolim.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/nuxunizorawixanugabenu.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/novekivotumobekofagibo.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/55241499433.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/30997275421.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/9cf53b7b5ea0523970de522a6b4db06b/21552526179.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/loxijubilifiladetibegik.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/bamuzepoxobowuraraturiju.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///31879325949.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/161360089ea303---13173041223.pdfIn PDF document text
    • http://ues-rb.ru/themes/ues-rb.ru/files/72058781908.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/79404054469.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16131b7e41025a---forapejujutanatexaw.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/pelanesizewemuxab.pdfIn PDF document text
    • http://pvvc.cz/files/97730504532.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/zomuxubavol.pdfIn PDF document text
    • http://www.louisianarebarcontractor.com/editorimg/file/77183254900.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16131af6c6ab02---22486220405.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=toefl+official+guide+5th+edition+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB65D 10772 bytes
SHA-256: 99421c1aebb74b36103144d0ada9cc684137a4a158e1ddddc9afc365a4faf212
font_01_sfnt_off0000cef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF8 16236 bytes
SHA-256: 70730b8997498fcfb1082a265f01cdeaef3575c1ec1f6c9f75d4c937da4836fd

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