Malicious PDF — malware analysis report

Static analysis result for SHA-256 212c4eddca3b0e69…

MALICIOUS

PDF

85.9 KB Created: 2021-09-06 11:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 88c5ae500b3b1c3f9559dfb7542e8dda SHA-1: ecd384476f8b92fd0305d1bf3905e9153f4825f3 SHA-256: 212c4eddca3b0e693328b909944fcdbcb0080575c25832c55b8c476b2ecdee09
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to potentially compromised or disposable hosting, suggesting a phishing or malware distribution attempt. The 'SE_INVOICE_LURE' heuristic further supports the phishing pretext. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a secondary payload via the embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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 https://ontogepszerviz.hu/editor_up/67451492909.pdf In PDF document text
    • http://music-summer-courses.eu/upload/files/zesozibur.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/67525342949.pdfIn PDF document text
    • http://www.ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/voluzodozufil.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/92371051137.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/38478614896.pdfIn PDF document text
    • https://phuquiland.com/upload/files/nizuruzisewenifava.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/75395373105.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2c1e015d3---86894850010.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/43605132963.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/1501ebe710f2052d259616e66d6cc6fa/wuxofiwemolobumirenur.pdfIn PDF document text
    • https://www.gico.ge/ckfinder/userfiles/files/rejepiferevoga.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/ditiza.pdfIn PDF document text
    • http://szcftz.com/upload/naninesonamivabamazavu.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160814df3744b7---mesujagedopa.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/8908980057.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/noajg8555gteac5a8p2vi73au3/jirefubininagusite.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607295b8c8e50---6418942381.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c29f55dbab2---xarilenelexevidefonik.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/refejizabom.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160faebcdd83a9---vifegixikovisewa.pdfIn PDF document text
    • http://effektfilm.de/files/file/xumula.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/sulosexaxewowisug.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/rexidurowoxej.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/surigivolekomigajawati.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/miwumelamulipejidep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=tcpdf+tutorial+espa%C3%B1olPDF 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_off0000df4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4B 21200 bytes
SHA-256: 8da5f2922455baf283aa39601462af6d76df485d673909b0bf74d3e76d9dc286
font_01_sfnt_off00011730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11730 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F47 10776 bytes
SHA-256: dcccf321cbd17d55b4fef762997d03820c8a2d7933afef41958c9b0ef34d976a

Open this report in the interactive analyzer, or submit your own file for analysis.