Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0a5ba29430d09c…

MALICIOUS

PDF

109.5 KB Created: 2021-09-21 06:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ffcdb91e9db6ddd45703a78270238d38 SHA-1: efc6e12a8238eb70cb49b6e3c4976ea715af1227 SHA-256: 9b0a5ba29430d09cbba236263caf9c444e9f4d2181721195a8416eecf96b172f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected by ClamAV as Pdf.Phishing.Trojan. The presence of multiple heuristics indicating a link farm, including links to compromised CMS uploads and disposable hosting, strongly suggests a malicious intent to redirect users. The embedded URLs, despite some being marked benign, contribute to the overall pattern of hosting potentially malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.2222

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://ferado.vn/userfiles/file/42124022751.pdf In PDF document text
    • http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/nawamunorodosinatisurajip.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/80449025554.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea57b47b6e---ziposubelesuxedegamevegoj.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/82499089403.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/1omjd7ba90uo5hvbircofgh5co/57979281546.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16131abd3c22bf---wozumawuwojelinevamofug.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/17017930989.pdfIn PDF document text
    • http://austria-ex.com/images/blog/file/sexufexupozip.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/10185979655.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16145e84bf1df9---59908149356.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/bosovisitexuwajek.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/62632281942.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/66707796110.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16147ba787b68c---9371512430.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/2299658791.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/940abc5dc093aed965e8ed0c3660b9f5/62684043104.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/wubisogatuxuwonokodow.pdfIn PDF document text
    • https://sklepbonus.pl/userfiles/file/48894825079.pdfIn PDF document text
    • http://stonepigments.com/userfiles/file/taneb.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/zilim.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/7bb3cf1de749bd0d658bb04239415d06/bazubowex.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130ee3fcb868---nuwek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=first+thing+to+do+in+minecraftPDF link annotation
    • 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_off00016237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16237 18040 bytes
SHA-256: 9c7e41318373230d53b94965d0c8b56ef4ececa63da0e60dd59190ab3b320938
font_01_sfnt_off000190f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1