Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0de0cc3d564827f…

MALICIOUS

PDF

92.2 KB Created: 2021-08-24 17:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d7a2824e814113a728772701fac522a0 SHA-1: 090ea5038062f5994d8fdf25e0e2dff800e24e0d SHA-256: c0de0cc3d564827f0bc128b2dc8d59a0d4d6d98806f5de2374a9420c4bee77c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of multiple distinct hosts and disposable hosting patterns further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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 https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/aedb516a2d67493fd67bb642d5196dcd/17704106489.pdf In PDF document text
    • http://turdv.ru/SITE/files/editor/file/60329470437.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/bodegajitepo.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/fuviwagutarumon.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c090d0d3e04---weketekoruxewiletew.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/mozekazej.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/db64ec6555cf595ca7c4bf0092667c75/34158272572.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/2247553939.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/7024662ff8f08d0cffa9b7d9b9576367/kelulisorami.pdfIn PDF document text
    • https://derfo.info/resimler/files/jabuxexavegimu.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/3c4420eec7e2be2b8ad0f2c41462f0a1/37939166760.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c73bc3f0ba8---zugapalawipojo.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/tutasupukipimafeva.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a90cef26f32---xifedategux.pdfIn PDF document text
    • http://packturf.fr/files/kosovagosevixog.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/98d7d0d4f9f18190305266cca6829193/vojegekowe.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/vonitopoxoz.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/b86d00c521fd2e4d38eee91c098a6ded/68757470752.pdfIn PDF document text
    • https://qwert5.com/psum/admin/userfiles/file/74975926524.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/8936846709.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/25514054778.pdfIn PDF document text
    • https://democv.associasuite.com/imagenes/contenidos/files/nujexedogut.pdfIn PDF document text
    • http://1mosref.ru/ckfinder/userfiles/files/visepujewoxovutumepujop.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb8039aa61---wetavezuluwedasimezijimav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+make+heavy+whipping+cream+at+home+from+milkPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD8 17956 bytes
SHA-256: 917ac94665f205616bf69dad27f05c88df7d7d5bb3830b979b8bb70a1e70c43b
font_01_sfnt_off000119bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131CE 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_03_sfnt_off000147da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147DA 11108 bytes
SHA-256: 2490b8c7d01fa7553bf9be4f7c451069201dce3b18b030388903e275047466f1

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