Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f527c268abce90…

MALICIOUS

PDF

81.8 KB Created: 2021-07-02 11:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5c450a14a2abfcea7203e574293251d3 SHA-1: 858de9ba9c8f1ba0994f44ea5875842b98d7325d SHA-256: 19f527c268abce90ed788c8e08664a6b6db0469a50cf0dc998222dbbf0923ae6
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous compromised websites, as indicated by multiple heuristics related to link farms and compromised CMS uploads. ClamAV also detected this file as a phishing trojan. The primary function appears to be directing users to malicious or compromised content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e9edd3621---pifolis.pdf In PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/0ue927lec0gjfflpc143fsdfj7/naratawu.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/gefezovexovogekosevixo.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/13918506749.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/okjl78ocfp90jc1mkh06pe6agu/gobelutetamejexugosux.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/70092245711.pdfIn PDF document text
    • https://kristinanamaste.eu/files/gurovureli.pdfIn PDF document text
    • http://mtprospectbaptist.org/clients/7/74/74f10a8404da00fab064704771972c19/File/gametok.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076be8bade1b---nifem.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771eea7c246---xinubadodelapowoked.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af73f5c411---vubevemima.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/9ln92h4n9oem37qjfaju7che44/30763640164.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886df7cc31f---51968142409.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f73ab5710e---wuposezisakusolajo.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1811cbbff8---litoxojedinazadupegodig.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757efcb99ef---60659007429.pdfIn PDF document text
    • https://aashianarealty.com/file/14864368453.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/15167825699.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/8740ac66c537b7b13899ba80316bfa9f/10897874353.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/54807037701.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/305c219fd00fedf19437f7e00aadf4b3/73737762084.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f4829d6a8---taturizozuv.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/48093870101.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/963daf4a267ac320ca2e8abf41720712/22910064214.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=an+example+of+an+endothermic+reaction+isPDF 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_off0000f8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E7 19204 bytes
SHA-256: 9f41fe55ee43e68e44fb5dc2dbc5e50dbb4a0337d6cbd3cb05189c997f2c3d1c
font_01_sfnt_off00012be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1