Malicious PDF — malware analysis report

Static analysis result for SHA-256 409904123e9fe4ad…

MALICIOUS

PDF

75.8 KB Created: 2021-09-21 14:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d6092c0106f5c254084446c62cbc6c2 SHA-1: 09b61ac9b5c729e4d7ddb5154850125a80de9f82 SHA-256: 409904123e9fe4ad1e89136dd365f0ab1ea7b1185ae5fa10ab26d2f34ae5b71d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous embedded URLs, many pointing to potentially disposable domains, suggests a link farm designed to obscure the ultimate destination. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6590

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zssadkowice.pl/pliki/37309072929.pdf
    • https://asesoriagade.com/app/webroot/files/files/xupuvuxalomuvelalibunamib.pdf
    • http://xn--80aamwn.xn--p1ai/userfiles/file/gaduvivijuwawomiwetegigi.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161490fcc6d7ac---gufovevefojusidaru.pdf
    • http://gbfrjournal.org/pds/userfiles/files/71743018870.pdf
    • https://samsungklimalar.com/upload/ckfinder/files/jokizanoweme.pdf
    • http://robfredo.com/userfiles/file/33180090005.pdf
    • http://yearbookplus.com/uploads/ckfinder/files/josazotizowazagevelupup.pdf
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/gajuzafojobuxoxojujodiki.pdf
    • https://tattica.byespresso.com/app/webroot/files/upload/files/bokakovajagujedigudezavod.pdf
    • http://wellogo.in/userfiles/file///xowenugozenodifixejizupe.pdf
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/xukuvasopuvebarariwuremon.pdf
    • http://www.sudeshnamaulik.com/fckimages/file/getebudegivuzevomar.pdf
    • http://www.somdattabasu.com/fckimages/file/61903823703.pdf
    • http://svx.su/ffile/file/25730951772.pdf
    • https://sino-islam.com/upload/file/210635279836.pdf
    • http://playonathletics.com/userfiles/file/foribosobat.pdf
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/30352803586.pdf
    • https://nocnepal.org.np/ckfinder/userfiles/files/7450918628.pdf
    • https://apartmani-mestrovic-krk.hr/files/26826731828.pdf
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/70411478081.pdf
    • http://fine-cottage.ru/userfiles/files/7289009844.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/161449fcae6ae1---42221280691.pdf
    • http://lgassociates.in/uploads/mugajumamuxukewunoxog.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=d%26d+starter+set+characters+pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc77.bin
f6b8fbe91d7d8d910c0cf66a7886a5e4dca1cc939756fcfd66bfdc2448b111b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC77 21980 bytes
font_01_sfnt_off0000f78b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF78B 16792 bytes
font_02_sfnt_off00010fa1.bin
f695977626623e59fedb2fbedebd468d0acf89ff6f6ceafeb3cee4351ddee6c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA1 9076 bytes