Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3f572618dd929c…

MALICIOUS

PDF

86.6 KB Created: 2021-07-02 00:56:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e2dfeb757735aa04b54a057d0ede57d6 SHA-1: fcdcfeecdeb00d8a872fe3910f947990466dc425 SHA-256: ce3f572618dd929cf4ac6ce6b5510eaf4d87e5bb61da9b9449943c9e06f3b005
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. While no scripts were explicitly extracted, the nature of PDF link farms often involves embedded JavaScript to facilitate redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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
  • 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://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe2ed4f915---89417140703.pdf In PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/eiogn8doh5ubea20u11tehjuc4/54755432910.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/files/luxululu.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/mojizoderibe.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607526f3ae68a---68407288452.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/6010afaa45fc606e195854d4d3c2ce18/15611480424.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd4bcb6ef9---593014800.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/vujifakifokofexalomo.pdfIn PDF document text
    • http://kidneytexas.org/clients/861060/File/82481245917.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16089779ddc30b---38498350964.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/j9g80391vvi7e3nvtqdoikvjsd/12117874262.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/gajugoluwupedaxerofobixiz.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1922c33980---90508930785.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160abc2c671f97---xemavadefuxumidafur.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/0pd990j1hqnh31n8d74i6em5b2/fopixamidab.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/0dac4a96fcc8dda5ade7d9fbffc86a79/milajelirozudeso.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/37568762336.pdfIn PDF document text
    • https://tavio.ru/files/file/zunoximowugi.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/50v591r0gg9de61dv5rfh185jl/xosonajofulujetosupef.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/kutibu.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/qqbe4e66lkiunij33qtu9bsvnp/fojome.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/pufozadofetijitix.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/949e4876b2f237b24e00cf3984da7730/menazepesuxisodapu.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f74ed76fc2---39421500219.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=class+10+english+2019+question+paper+with+answersPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000ed43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED43 11356 bytes
SHA-256: 076bf099d09950004a26e199697e586d7537b3c8e19b5e40db3511bf6c30886f
font_01_sfnt_off000107cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CB 17464 bytes
SHA-256: 195fc6c7f29c8555294ea2f59be938fbbde19d2c8383219cdd844524a89cb081
font_02_sfnt_off000134f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1