Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e15fadc326b571…

MALICIOUS

PDF

67.9 KB Created: 2021-09-21 19:19:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2a8cea9c0d2373c36147bbf198074e0b SHA-1: 3791b79a27d028ea9466e83f807c59786bcddeb7 SHA-256: e1e15fadc326b571417d945a3958a0d997a128173476ae30f912dabd6ba8153d
132 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution intent. The embedded JavaScript likely facilitates the redirection to these malicious links, which are designed to exploit users.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4355

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 https://garglob.ru/uplcv?utm_term=redeem+roblox+card PDF link annotation
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/knp4cv6eqm1j7rfgso8rujruq5/49096729276.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/5766800098.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/53610920009.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/fovemu.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/bobafimotijudisog.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb22b0403b---38529999592.pdfIn PDF document text
    • http://plantessentialoil.com/upload/files/74283884854.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/vesisepu.pdfIn PDF document text
    • http://insureavisitor.com/userfiles/file/89877598015.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/23870775515.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/kovolujimuwenodajol.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/wawegorapifage.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/33695569255.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/duxikara.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/9cdeabbc0f8276a2e144ae6dab1bad83/tibezuwo.pdfIn PDF document text
    • http://bibikid.ru/upload/40174235833.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/1810875056.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/4ba80b5fe2b2b0dbfd430fe3d72db190/57623912947.pdfIn PDF document text
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/zexovomuvo.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/vobadu.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/wewufafatazi.pdfIn PDF document text
    • http://bulmarconsult.com/files/juwutavebovutesetinixevul.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/64591664945.pdfIn PDF document text
    • http://finchamauto.com/pics/49604731374.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/kapokexaxo.pdfIn PDF document text
    • 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_off0000da5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5D 10356 bytes
SHA-256: 90ee659d1067692b68842e2457dcea8ef0e7931ef1c43b65e6f6a3c7ee376353
font_01_sfnt_off0000f1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1