Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed814d0aa1c26ab…

MALICIOUS

PDF

78.9 KB Created: 2021-07-03 05:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e838f889799ad65fe2ba77376a15091b SHA-1: 5d761612ac259743da295b5767bd8b8acfeefaca SHA-256: 5ed814d0aa1c26ab58626a05e156dee82a7cb21208afdca8b6bad2b00309259c
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple external URLs, many of which are hosted on domains associated with compromised CMS uploads or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. The document body is unreadable, but the heuristic firings clearly point to a link-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6335

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://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/q1h39kopb3dtgds7rnqj5hd88g/23848420602.pdf In PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/u7cqumsfjbnsbiefchugjse8t6/75036603597.pdfIn PDF document text
    • https://t2sc.me/userfiles/12005177139.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/wevujodilof.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a6936418b40---18869736446.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/sedobamudinikexifoja.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/fc9u8odvegp7shb02gkrr6v393/40507163222.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/60664632840.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/gukopodewa.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/vj77rc9io5eadtajcl4gv5mu8c/wagutumelivipideramita.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/nhmtqrkdebbbifrrm7brhfml0u/33887958659.pdfIn PDF document text
    • http://mountcalvary76.com/clients/9/90/9062e1c9f2360b2cedac6e2854879500/File/36829374474.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/f50dfe26d15b1acdcef87b4b147a25f8/66190949280.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3044e2eb1e7a11c3675fa62605c7eba9/fexudimafe.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/1ca92fc89df962c9a3a62807c901336e/wefem.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cf24544bfa4---zeborox.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/68140432050.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608120fe7dcd6---jebew.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/48184913677.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862c0f6927e---87995433214.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd6b522137---luzejitegulotijawogal.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/e0g50ubokfge46dj5kk6jveklk/tisupeji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+force+an+iphone+11+to+turn+offPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C5 10592 bytes
SHA-256: 8164aba870a0692d4b87f475ac2bbdafd41a656b66598e7837491d206c5a8a2b
font_02_sfnt_off000110f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F2 16936 bytes
SHA-256: d64fdcaf4d23a9dd4ad0395a59c3f5a10e52dd5a9790bbc3d6316974307d9eb8