Malicious PDF — malware analysis report

Static analysis result for SHA-256 419827bd4a6535ee…

MALICIOUS

PDF

62.3 KB Created: 2021-09-23 20:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 24fbd6f6adb77a49e22813b0b0082bb1 SHA-1: 13443c62dadd48c5503fbe451cc2bf40fab1abfd SHA-256: 419827bd4a6535ee70d2dda9b0b998221fbc0047f52b10af6a62c635d3e23d8b
132 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for executing malicious code. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous unknown URLs suggest a phishing or spam campaign aiming to lure users to download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6412

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
  • 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://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/23526278789.pdf In PDF document text
    • http://asremajazi.com/uploads/files/58626069348.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/29032731755.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/sigoluneturezoxinaxoziwa.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/riwezuv.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/wafibowarunokobazuzudo.pdfIn PDF document text
    • http://sergeybazarov.ru/file/51032357059.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/9v6iv1632e0via8lb4jhcgi193/sibubuwarojafatigobinuvef.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/folozipewizegib.pdfIn PDF document text
    • https://eurochen.com/UpFiles/WebEditorFiles/file/55773555428.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/89943743391.pdfIn PDF document text
    • http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/68855116085.pdfIn PDF document text
    • http://roocenter.ru/upload/file/69881727902.pdfIn PDF document text
    • http://mojahotels.com/ckfinder/userfiles/files/60553882490.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7da682b6981549045976b595997ffe9e/lejuzolisugozeresetositif.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/23844282184.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/41765946282.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/95038431588.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/1685837611.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/sojezumoxuwek.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/68245848752.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/jukavazifadope.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/jokit.pdfIn PDF document text
    • http://stillincontact.com/images/mails/file/wofir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=gloomhaven+forgotten+circles+rulebook+pdfPDF link annotation
    • 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_off0000ce3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3C 18592 bytes
SHA-256: ee256829327d92f2acedbd6572d77b022b899e926434e0a839ee99b90124f5fe

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