Malicious PDF — malware analysis report

Static analysis result for SHA-256 0927a601b2121095…

MALICIOUS

PDF

83.8 KB Created: 2021-09-09 06:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f829a652113dacecc35a8987a8fc8c64 SHA-1: 82a9d9c8da50b3b421d45b83d1b54af81328899b SHA-256: 0927a601b2121095e156f41f7e24c6902fa17f1f7a11725fe9b98965141817cc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to a link farm, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://missteenqueenuk.com/userfiles/file/96580181936.pdf
    • http://xn--2e0b30g3uq7pay7m.com/upload/fckeditor/file/siwesoguges.pdf
    • https://siriusdynamics.com/assets/uploads/files/30179886571.pdf
    • https://www.rapn.ru/ckfinder/userfiles/files/14729948539.pdf
    • http://hanhthien.net/uploads/file/daroxusonexazoxeses.pdf
    • http://www.tramag.pl/upload/file/sikaxiguma.pdf
    • http://bielle-srl.com/userfiles/files/levoxagewegefasa.pdf
    • https://pediatricpotentialsnj.com/PP/PPpng/files/87628096786.pdf
    • http://isgsrl.it/images/file/22061435455.pdf
    • http://partnercable.com/files/21062820536.pdf
    • http://laserinnsbruck.com/static/zaxakaxarukewubiki.pdf
    • http://yingtailong.com/upload/file/210905143136421016gn6kzsikv8jg.pdf
    • https://vjlabor.pitscovn.com/uploads/Upload/files/resiluzilopewurimidarox.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138c79c81445---vipedapuz.pdf
    • http://ormansagszive.hu/upload/file/74757612882.pdf
    • https://groupburuemas2.com/contents/files/17716724716.pdf
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/27018303051.pdf
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/vanaguvebivejisugav.pdf
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gilinuwamizorudekugaz.pdf
    • http://clinicaveterinariagussago.com/userfiles/files/18280426331.pdf
    • http://rafaelokazakov.com/file/16214066025.pdf
    • http://spreewaldatelier.de/img/editor/file/52578954406.pdf
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/fuparomivukupax.pdf
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/naxodoti.pdf
    • https://stichtingech.org/ckfinder/userfiles/files/zamulunulovomefije.pdf
    • https://ev-owners.jp/userfiles/files/29798419011.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f93d330e8---25474614637.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=save+pdf+of+website
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • 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_off0000e641.bin
df26aa86b1da4943612f7ec7b9b9438dbdc4beca28e0eab68634dec6be6c61bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE641 10608 bytes
font_01_sfnt_off0000fe74.bin
50475daf1a1650544d4f90c1e5618aa0bdf9241e6bacf65c1df11386e8d9ba3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE74 16708 bytes
font_02_sfnt_off0001298b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1298B 16792 bytes

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