Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e4464bde9bf601…

MALICIOUS

PDF

70.3 KB Created: 2021-09-20 13:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 5023865d1eb9b5cf12d8376c0f31bd00 SHA-1: 02cd81eccae9311fb84a077f063aae25f106c3b9 SHA-256: 53e4464bde9bf601c77ad7f1328e86fdf665a064c9360caa5d4c02362b3bb537
132 Risk Score

Malware Insights

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

The sample is identified as a malicious PDF by ClamAV, indicating it likely exploits a vulnerability or uses social engineering. The presence of embedded JavaScript and a link farm pointing to various domains, including compromised CMS uploads, suggests an attempt to redirect the user to a malicious site. The primary goal appears to be phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4393

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sjanzee.nl/file/gukaxinenilubugunumakalo.pdf In PDF document text
    • https://sproname.com/files/userfiles/files/gamurizefomelasesun.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/xekefatarogefisurilij.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/jijem.pdfIn PDF document text
    • https://snpwachq.com/files/js/ckfinder/userfiles/files/madidexatavebufogimesu.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/segijusubaxarun.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/78539006911.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614420da2636d---4077655323.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/65881423946.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/19c21b6f2065604ccb4900381cb29013/sagaxinewaxolilopogudig.pdfIn PDF document text
    • http://apple888.vn/luutru/files/69228091598.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/59569410947.pdfIn PDF document text
    • https://panoramamall.bg/ckeditor/ckfinder/userfiles/files/26853668064.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/60271115611.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/wejisevulufal.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135449a4b18d---21112455694.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/76817903830.pdfIn PDF document text
    • http://krallarintavugu.com/upload/file/medotirufox.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/niwepove.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/dekujamujuk.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/76917006080.pdfIn PDF document text
    • http://eko-gospodarstwo.eu/files/file/jojorori.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/161393221429c4---40323210770.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=mx+player+pro+crackedPDF 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_off0000d616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD616 10348 bytes
SHA-256: c6d6df5823deae0a0bf1629bcbabad6664769860b944c8f6d55cb74c77208329
font_01_sfnt_off0000eda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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