Malicious PDF — malware analysis report

Static analysis result for SHA-256 23202e359fda39f2…

MALICIOUS

PDF

78.0 KB Created: 2021-09-16 16:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b34c0c1d55d69e62e2d85737425c7a3c SHA-1: d33076ecda03dbac3234b31edc235d2b737b6531 SHA-256: 23202e359fda39f2122ff15ff2a3ff11ea9a3836e9e59b7760592ed60fe8e0fc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous websites, many of which are hosted on disposable or potentially compromised domains. The ClamAV detection and heuristic firings indicate this PDF is likely a phishing or malware distribution lure. No scripts were extracted from this sample, but the structure suggests it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4578

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 http://ladyqueen.it/userfiles/files/93837087195.pdf In PDF document text
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/34579900515.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/sejafi.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/50550491639.pdfIn PDF document text
    • https://webrobogo.hu/kepek/fegigikozegiguzaril.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/wopipiraketatolib.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139956b4623d---19594259038.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1630817212_960575cff9.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/gizefubukuguwa.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/95412285170.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/98323128506.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/71261600523.pdfIn PDF document text
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/xabikuzajuxuwatu.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136aaf3c512e---kokataferiwunisanejafo.pdfIn PDF document text
    • https://tidymoney.com/ckfinder/userfiles/files/22444062915.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210916104355_yg3bgz.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/922hadpvg52mmcpkq482sp5ikb/xadodef.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/wawabinazosisi.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16137108c1ec2e---8304654749.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/7445955532.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/745ee7fbd1165cde1e463ed22e1397c5/vunavalubival.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/wikawu.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/672e8fda9b43c68793457a95256bfba1/79413224204.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=shareit+android+source+codePDF 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_off0000e4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EE 17928 bytes
SHA-256: 9d94d3d482e892386d307efd44dfbb7fc12ec923c356bd7bd39c0e3be0506f74
font_01_sfnt_off00011305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11305 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1