Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6f4c278434107ee…

MALICIOUS

PDF

93.7 KB Created: 2021-08-12 05:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4a1c4795f0b65c3ad5a64ad91e59f65a SHA-1: c71c1041bc1e187fe95696e32151c8a8029d0866 SHA-256: b6f4c278434107eec0063e85d1bc642b3eecd20145ef5308e5e1843b1872a152
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs pointing to compromised CMS uploads and link farms on disposable hosting. These elements suggest the PDF is designed to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6775

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://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df427a1242b---15917384633.pdf In PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/supukeseguvofaf.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/eurc0gke65mlhactuts19hrgu6/33806174068.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec5824c613---wurafulonekozafanurira.pdfIn PDF document text
    • https://hyundaia.ru/userfiles/file/fukasu.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/ooupftnu4smjma0luhldk1sjnr/bevukapez.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/33248207100.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/41f3b58eaaa3d3762986519eca48c6c5/bikomefajijamotepokodo.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/29911568173.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/for8rbum49a5j1ljjmsio8fbr7/nukimobewelo.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/zazibojavitasugis.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/6577ed2673433f806000eeddf49e39fb/22972213031.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/fasinujufutader.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/q1rifsmm4ccbc7o7bkff5kg5b0/82316193244.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/zaxumutujazi.pdfIn PDF document text
    • http://inbjnews.com/data/cheditor/0603/files/juguluzipifajavazixotaf.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/20520899806.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/sosonixinuxakexe.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160841338db8a4---33087268768.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1927a736b---45822045970.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/7r8vnad58dq3l2fvfmhhjko0pb/24477316678.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/51083124895.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/bifokonetubovofirisor.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/23221154727.pdfIn PDF document text
    • http://atsrealtyvietnam.com/upload/files/87971425147.pdfIn PDF document text
    • http://myrbacken.se/login/ckfinder/userfiles/files/zeluba.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1b7b8bdfe---tajigufovemelele.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=motu+patlu+wala+cartoon+video+songPDF link annotation

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