Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b75b842824f5249…

MALICIOUS

PDF

63.7 KB Created: 2021-09-13 10:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a9c51248092a53c3501ee30cb6559457 SHA-1: 448de54a0ee61e6b6f9c957c636759e5b2a47230 SHA-256: 2b75b842824f52492f1e55aae698b12d41d3c31e6ce7b0e527be92eb23e94191
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7025

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
  • 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.
  • 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://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/puzenizazunodelomev.pdf In PDF document text
    • http://studiochiodo.eu/userfiles/files/94884366242.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/vozexopenewogijalu.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/qc10itce6dh2jbmvhq6artrlh2/ximaroruzakukazepafopiso.pdfIn PDF document text
    • http://nanoservice.cz/upload/file/41551452657.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/86524546327.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/vivugugumikebajufifaju.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/suvaretab.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/3e9dcbba69754efd64be6130b38b7fad/9641922940.pdfIn PDF document text
    • http://harrodsrentacar.com/public_html/userfiles/file/zutufeke.pdfIn PDF document text
    • http://th-hl.com///upload/files/34098916755.pdfIn PDF document text
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/91844614706.pdfIn PDF document text
    • http://dogomanhnghia.com/uploads/files/32635931844.pdfIn PDF document text
    • http://bainihu.com/upfiles/editor/files/bewowovorubojobamivuxipe.pdfIn PDF document text
    • https://synersys.fr/contenu/file/1013758202.pdfIn PDF document text
    • http://szpitalstrzelin.pl/userfiles/files/13385441208.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f910efbda---fotumamemitedesefu.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/jugidexivir.pdfIn PDF document text
    • https://www.campacinter.com/image/upload/File/22092989638.pdfIn PDF document text
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/doluzularowogasodafitoxa.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/30452956605.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/pebogafefosar.pdfIn PDF document text
    • http://masonhn.com/d/files/lutus.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/98166743850.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=sky+view+free+apkPDF 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_off0000e447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE447 10248 bytes
SHA-256: 47791104e1db1b334e40f9c94191b3d0498cc623b5d7dfd4111054d395a87ba8

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