Malicious PDF — malware analysis report

Static analysis result for SHA-256 1933b4e396009a73…

MALICIOUS

PDF

79.6 KB Created: 2021-09-03 19:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 578f7a64516d9d8e6652486f3f15adeb SHA-1: b31787e79864cdb42a8762b227e82e2a21e329de SHA-256: 1933b4e396009a73bd44248fb04263511f27bf5c794507aadd32121fbf0048fe
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains numerous links pointing to external websites, many of which are hosted on compromised WordPress sites or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing pages or download further malware. The file's structure and numerous URLs suggest it functions as a link farm designed to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5517

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://huntic.ru/uplcv?utm_term=globalization+and+culture+pieterse+pdf
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/2fd33d230628a52ca0d74ab3b7f937a3/sololijegunapesov.pdf
    • http://i-p-p-c.com/ckfinder/userfiles/files/dulelamoduko.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/sekaluduze.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c64b474bc0f---89211673955.pdf
    • http://toyteepee.com/uploadfiles/file/2106060452550096223vfaa6.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/3evki93tqv6llgmp1on9sqiig8/85429118786.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac578f0040e---tujexovomararakor.pdf
    • http://jjmcp.jp/userfiles/Image/file/fosuruvapexogud.pdf
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/80355351568.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07d8f6a16d---37331983639.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c56cb7c05de---zetuxufobafi.pdf
    • http://tksvolga.ru/userfiles/file/89975160768.pdf
    • https://mfdesign.hu/files/file/39708198562.pdf
    • http://kolesnikov.pro/ckfinder/userfiles/files/54298914572.pdf
    • https://nepaltrekkinginhimalaya.com/assets/userfiles/files/16615093733.pdf
    • https://luathoanghuy.com/uploads/files/27817206596.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/4aten05vm1gh1dfdm2vvf37al6/2585960094.pdf
    • http://olympicburger1988.com/uploads/files/43050338418.pdf
    • http://classicalgardenfountains.com/uplds/file/tojunaxixidodemotumun.pdf
    • http://luatsutiengtrung.com/app/webroot/uploads/files/togef.pdf
    • http://learningkey.org/userfiles/bifemugovopijufagiroma.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/aced18d0f4717af16d981c14b0f7f8fa/fidolazuditikesapurilosip.pdf
    • http://hart-metale.pl/gimnazjum/userfiles/file/jolujukizizumoboje.pdf
    • https://alatheir.com/atheirwsfiles/file/18875625499.pdf
    • http://a-pluset.com/userfiles/85978626928.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/478f4258d6ccbf90ebc39be33e62dcc7/xufosazolugudegusapofekev.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f752.bin
63c2af2ee8b91b3b5430095aceef9ce7cd5d0c0f0aab3dac5468e2cc3bdf2fdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF752 19672 bytes
font_01_sfnt_off00012ade.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADE 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.