Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4812dba248aac19…

MALICIOUS

PDF

69.3 KB Created: 2021-09-06 17:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4798489a290aab1f45994c59f415235f SHA-1: 44749fd11641ee4b10f0d0fd5bbf1e49e90861a2 SHA-256: f4812dba248aac190fdab3eb05dbeb55d3ae8c832d0e02ff22cab8317e5e724b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a link farm hosted on multiple compromised WordPress sites, directing users to potentially malicious PDF files. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5522

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://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/0559766ef76d715b43935e5ed6cd0a22/94736743936.pdf In PDF document text
    • https://benqmusicworkshop.com/fupload/file/miwekike.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/mosaxiwevexopikonuvajod.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/ufdv8mnla0g95rgdfe16mcdv34/36387897059.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/sufejefebexurulepa.pdfIn PDF document text
    • http://exdebt.bg/userfiles/file/xojoresufaxapelidu.pdfIn PDF document text
    • http://gusanhightec.com/userData/board/file/vesufofu.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/revimib.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833dc0231fb---12317922607.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/66427530635.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/77019519096.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16089234d994fd---bakorakutiruxano.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/28904697889.pdfIn PDF document text
    • https://anaksemut.com/contents/files/katavetez.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/560635012.pdfIn PDF document text
    • https://noddy.nu/images/file/josugolawifotipobovelifa.pdfIn PDF document text
    • http://dd-eng.com/files/files/mifuwikimimufope.pdfIn PDF document text
    • http://imosa.asia/uploads//files/202108030630094619.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/44172112542.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da22a585aa---dozuderapubelibipa.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/4fd3f25f6a24ba4469af3ac86305bbd9/18883859750.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/7cbf158f205a1e55834efc01b9c13fbb/regen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=ghostscript+combine+multiple+pdf+filesPDF 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_off0000d3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F5 11000 bytes
SHA-256: 379388fc6f98a176c1a151fd91f6706f1d7f09c5843e8bd7592852950ac9da2d
font_01_sfnt_off0000ed1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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