Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb90f867fa589cce…

MALICIOUS

PDF

73.4 KB Created: 2021-09-13 12:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6797c0ac02c4dc0e559b2411c71d3000 SHA-1: f3a8faedc623cd5a304e605913f2eb6440afe6a4 SHA-256: bb90f867fa589cce9467ef27b3408feee0d136752c179a2fdd770c64e0b82f36
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, further supporting a malicious intent. The presence of these links suggests an attempt to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4179

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://e-sportis.com/images/upload/guposamal.pdf In PDF document text
    • https://www.gurkhasfinance.com.np/ckfinder/userfiles/files/66122978268.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/30026515019.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/92657536255.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613efa2c7b486---jumebefisonozexilitixan.pdfIn PDF document text
    • https://vr-spagna-20.effievirtual.com/galeria/files/8135374569.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/bomok.pdfIn PDF document text
    • https://cqhuaan.myhost360.cn/upload/files/09-01-21-27-39-74.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613227a4b7aa1---lewokimuwetijakedotu.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/25321629031.pdfIn PDF document text
    • http://wamer.org/userfiles/file/49441897285.pdfIn PDF document text
    • https://shivajigrihnirman.com/singhania/downloads/file/16162739468.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/peruz.pdfIn PDF document text
    • https://dalyanestate.com/userfiles/file/gotufabazisofizo.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/81360748518.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/e8cbf108fd9a309102a074e6d22fddc8/47281332416.pdfIn PDF document text
    • http://izmirtavla.com/upload/file/58504859739.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16134e7e23d289---xowawowibeg.pdfIn PDF document text
    • http://rts-3.ru/upload/files/jetitidabomexod.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/33659892504.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/dea52734b3502569b1e925f9d441530c/zigugininoleko.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/19083862955.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16136c4d45bd1b---minamat.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/buneporat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=can+i+recover+my+photos+after+factory+resetPDF 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_off0000d18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A6 10912 bytes
SHA-256: c26182b5a9e87804aada2141350c3b77d12fe2d6f5a630bb4803e5e7c02848fa