Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d782c4504beb747…

MALICIOUS

PDF

79.5 KB Created: 2021-09-07 12:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6e2b84873bc69fc38d3eca3604a63c48 SHA-1: 679efa41cda6943b88dfc0e81e3c4247fc526ab8 SHA-256: 7d782c4504beb747ae0913f8cd775ac8c80cd25ac198156d2caa73cec1452b4d
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1190 Exploit Public-Facing Application

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, suggesting it's designed to deliver a malicious payload. The heuristic 'SE_INVOICE_LURE' indicates the document's content is likely a deceptive invoice or payment request to trick the user into interacting with the malicious links. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6bf0cbc8ab---rewizapap.pdf In PDF document text
    • https://aduanaldelvalle.com/userfiles/file/54416759561.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/664c89a151b07649dcf9f24268da8be3/13355027176.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/81117844325.pdfIn PDF document text
    • https://adikketiga.com/contents//files/jelobaxaba.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/wupezonofotinurami.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/mosaxugofazodet.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1612181d5d7254---pimigurewadanap.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611cf54173281---97793682650.pdfIn PDF document text
    • http://kprmk.pl/userfiles/file/texatatuj.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/tonuzegujovon.pdfIn PDF document text
    • http://cortabellanews.com/userimages/rifatepiwadezofefudirewa.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/gakadevep.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/2327088493.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/rawumowulaxujunuzafajowiz.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7f94c8bca2---zelun.pdfIn PDF document text
    • https://artbynela.com/uploads/file/vumow.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160db0d7533e16---notawefetopuf.pdfIn PDF document text
    • http://tnmetalworks.com/images/files/rakefodolerexopusexugoxe.pdfIn PDF document text
    • http://lhs1965.com/clients/880801/File/20754039456.pdfIn PDF document text
    • http://effekt-film.de/files/file/84747702993.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/lizuvapulobiderafet.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/juzifar.pdfIn PDF document text
    • https://ms02bet.net/contents/files/62978323088.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=symetrix+radius+manualPDF 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_off0000c9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CA 10680 bytes
SHA-256: 2c0e30264da5b53bfc8e8510bc5b4920511b8edb8363fe14332174b79a3a0f8a
font_01_sfnt_off0000e24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5D 20504 bytes
SHA-256: 439bdb8317e4cef1addfa92eefbf3c91ff77a29ac1668dc1d3d79541d9b717cc

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