Malicious PDF — malware analysis report

Static analysis result for SHA-256 210744d5b420190b…

MALICIOUS

PDF

84.1 KB Created: 2021-08-20 18:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 008b7ca3ebbe6a80c8815dce2ad9b376 SHA-1: 5cb078a0dd1ba7e7d935b1b935ccbed28f64acbb SHA-256: 210744d5b420190b70f64d1f80e612ab2bc8288c74a3b9907d73ba7aa60614fa
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and multiple external URIs, including links to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malware. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass security scanners. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://tano-cable.com/d/files/62798029558.pdf
    • https://ourcampuswindow.com/ckfinder/userfiles/files/69852253857.pdf
    • http://studiorinaldibedin.eu/userfiles/files/57921165041.pdf
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/84059537751.pdf
    • http://travelshops.pl/userfiles/file/48359011294.pdf
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/lubetujivaj.pdf
    • https://murderescape.com/wp-content/plugins/super-forms/uploads/php/files/017ab1583c6befb03f8f7d8a0d9b0b59/66041704750.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f07a07e146f---39577645825.pdf
    • https://edcasys.com/ci/userfiles/files/doxiwirijejifugurarigezug.pdf
    • http://sochi-polyana.com/ckfinder/userfiles/files/8007648774.pdf
    • https://gemwares.com/userfiles/file/nopoxumaropikuraro.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607a12d160e94---67210977495.pdf
    • http://palakkadtourism.in/ckfinder/userfiles/files/80676836459.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/ca1d81f57aa8bc3b2713f9b9e6942dc7/fowabixiserafoza.pdf
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/pokosokuzavuderogubaxumi.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/j2o7l38dol6veor1l6oaoo1kaj/fakuleludagumuf.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/o1rlfbm5397442d5kui3djggi6/42084852154.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/d77d48dd60be8b85df27be0844f1baf0/12778237407.pdf
    • http://valifyrepapillon.com/clients/6/68/68e1c6a84db99a04c21676ff826d6e37/File/59739796101.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/25257f884d56eb90bbf012008a506db7/85877191419.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/cc983cb1fc499001cd3baf41436a75cc/51042697585.pdf
    • http://xn--9w3b11kh5l.com/ckupload/files/nulukojodufubozupone.pdf
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/vorid.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=descargar+adobe+after+effects+cs6+full+espa%C3%B1ol+32+bits+mega
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de0b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0B 16792 bytes
font_01_sfnt_off0000f61d.bin
4fe5ad37278e82eb1c8ff01ab2e0941de1dd1251249288d689b1e6bcc3ac9354
pdf-font-stream PDF embedded font (sfnt) at offset 0xF61D 17560 bytes
font_02_sfnt_off000122bc.bin
63c5da2ac5676d08e72a33783d62860d50a2198a9b97b5f307fdfaab19e755eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x122BC 11764 bytes