Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e41b32d89e50a9…

MALICIOUS

PDF

51.6 KB Created: 2021-09-30 13:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a8703b6655d2bdfa7aa12459ec02ba91 SHA-1: d9b00b64aa5e29ec75f5922928d467fcee127730 SHA-256: 19e41b32d89e50a946e61eb8a963483ec576307cffb1ed00fab21c58accc1123
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs pointing to disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to exploiting PDF vulnerabilities to execute further stages. The presence of embedded JavaScript suggests an attempt to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8764

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://pixomot.ru/uplcv?utm_term=ppsspp+game+pes+2021 PDF link annotation
    • https://albertoangel.sinecsas.com/ckfinder/userfiles/files/29472782096.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/88206432249.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/99471978189.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/nesomavova.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/sopitaxefabewazadeduj.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/e0cadd299dd00abaa5c34f9ea450bca9/bumilopuladawigifikexises.pdfIn PDF document text
    • http://skalamatbaa.com/userfiles/file/61634625496.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/47446781892.pdfIn PDF document text
    • http://salamatekhanevadeh.ir/ckeditor/files/files/5659888654.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfe36ab92a---siroj.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/bafeziwiw.pdfIn PDF document text
    • http://napiarsaigh.com/images/84648780960.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/75265117653.pdfIn PDF document text
    • https://vestol.bg/files/file/14152395623.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210923_2BD69AFCF13717AE.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/88355884968.pdfIn PDF document text
    • http://maintenancebazaar.com/userfiles/file/werivanewutif.pdfIn PDF document text
    • https://xlquality.com/userfiles/file/pitojerivabew.pdfIn PDF document text
    • http://falconltd.pl/cache/file/xerizonotijasujaw.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/lunol.pdfIn PDF document text
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/kosenotojenarote.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/buzewepipatolabu.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/neperane.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DC 10332 bytes
SHA-256: d7f0a6a0bae655b72ab71a77859e1cd43194575b893904363da1dde611a2be08

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