Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e90204902f16107…

MALICIOUS

PDF

82.9 KB Created: 2021-07-16 08:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 9549e3fed16e3ccf5897410ae7b84046 SHA-1: 0ef86820da54da77eca02906cf151810f1348b67 SHA-256: 9e90204902f16107e6c132b2adff5eea99d7e6b32fe018f03fd62106a122ecef
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for malicious PDFs to execute code or redirect users. The PDF also contains numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • 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://skybuildinfraprojects.com/uploads/wajele.pdf In PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/ed95f9061fd92ad55628876d333f68d8/puwox.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/19722782636.pdfIn PDF document text
    • http://arablift.net/userfiles/file/nadaweju.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ec6896404---62983368730.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/db091d1ba2e8d334682acbc2bae98fe5/22245674337.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/24063687208.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/broa7tlo6t508u9qi87j7l4abf/wusoxejagobuxafobama.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/lasuforunusiwiwob.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/rovebafumowagebelesevib.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4b2cb7718---3995854300.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16084a6de20697---5559412147.pdfIn PDF document text
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/36222635326.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/68429156966.pdfIn PDF document text
    • http://ruresept.ru/files/file/fubinogesub.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/1oii4kh2h5iui1rtvs4al08so2/99379477688.pdfIn PDF document text
    • http://teerosy.com/ipp/images/uploads/files/64264870630.pdfIn PDF document text
    • http://szamosiszerviz.hu/feltoltott/files/nezif.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/2d0108fb2293795425654cda678f2853/boxekiwa.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a704e10e08f---tudugowoxaburix.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/59ccea178cab33b92752d9734400ba81/minurikewigut.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff67d4b78f---pazitozegovefegevivefot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=iit+level+questions+for+class+10+maths+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A1 11320 bytes
SHA-256: f769767141221a29ec0e867f04f9d03f64a9d71eb2bc3769491c0e1e0c947499
font_02_sfnt_off000112e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E1 16832 bytes
SHA-256: 0bccd8c43c0b07e4d339a896a2a3fef3422655fdbc46223f78cd8dcc4569503a

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