Malicious PDF — malware analysis report

Static analysis result for SHA-256 42574c9779dada40…

MALICIOUS

PDF

85.7 KB Created: 2021-09-09 18:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 6328581cc123bcd2fb0172f0e687654c SHA-1: 6ba3da6b24221bf59ee0917a8d7e688dd6f6ec5f SHA-256: 42574c9779dada40709143444d38748be2ed467dc211ac395d6b0ddf09897fdd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for exploiting vulnerabilities or redirecting users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of external links pointing to potentially malicious or phishing sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mybyblos.com/userfiles/file/wulimolajow.pdf In PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/66440947175.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/33621717757.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/6576504474.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///kukivixijikaxa.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/14251012726.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/nopunab.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/e185d6be9719ee2db9b1c4ee627eaa3b/83923213003.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/nuboxasamolovisif.pdfIn PDF document text
    • http://cokhivietuc.webthoidai.com/img-vietuc/files/givatodupaketowa.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/a88f913f1d6c14255e6e4149e6ea5946/lotabifapobifobifi.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/belefefedawag.pdfIn PDF document text
    • http://fitviewer.com/files/file/zexupipakonerokejumalosi.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/67799935147.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/tebajena.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/25607563396.pdfIn PDF document text
    • https://newdesert.pl/userfiles/file/51717342333.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/domigugaworefevoru.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/teruzijubipomopesox.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210906_113634.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/xaduwusodewawarajamap.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/veliviborupi.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/51693174800.pdfIn PDF document text
    • https://el-tall.pl/pics/file/83465889711.pdfIn PDF document text
    • http://perechen-izdaniy.ru/js/ckfinder/userfiles/files/29932232439.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=android+block+cameraPDF 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_off0000e8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FE 10476 bytes
SHA-256: 4f47b0fbf2ae91ba72d0946719b2530e3d41d5e177f8c1a314180dc246e8a5ce
font_02_sfnt_off000118b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B9 18852 bytes
SHA-256: 9f1ca00ec0381a3180bdfd1143dfeb8b5e273217e977f049ea5fbb703fcbad68