Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a2c5c9c7399b6a…

MALICIOUS

PDF

84.5 KB Created: 2021-09-22 21:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 623a8777388bb80346eb8a779cd0b22e SHA-1: 3e32ea41a7ef38a25b28516f89f1d712935584be SHA-256: f9a2c5c9c7399b6a4740738d2d4048099fd070c4a661d5a75452304969e04495
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a link farm designed for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further support its malicious nature. The presence of external URIs and link farms indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5544

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://queure.ru/uplcv?utm_term=maze+runner+book+1+pdf PDF link annotation
    • https://receptabc.hu/images_banner/files/wisinufovutidefu.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/59323853132.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/lorononotigevoxavudu.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef74cbc2e9---62403658534.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/32775898103.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/minogasegefomawowowufazow.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/zoxuzi.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/figare.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/jomufimufezogesagafuredef.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/78aa0a7d1724ce2a7b4e9b9aa423f7e7/tolise.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/13012146207.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/dixesexuxasoki.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/mukizogupewizabirat.pdfIn PDF document text
    • http://tid.vn/upload/files/luwimajofusev.pdfIn PDF document text
    • http://ieltsadd.ir/cache/fck_files/file/82315267874.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/656806d3c0e29934860ed0a43080c24c/satepebepurijumupu.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145fd461d16b---toziledalorurizitejiwav.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/wijekonodokilosafubonulig.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/japol.pdfIn PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/fakikifir.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/67527691890.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_off000111e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E3 10524 bytes
SHA-256: 666d0b2f60143dcf91a1c49c4c00facffbdd767a47d2ed9a7f5c438aa584dce5
font_01_sfnt_off000129cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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