Malicious PDF — malware analysis report

Static analysis result for SHA-256 5deaf2aa193037af…

MALICIOUS

PDF

91.4 KB Created: 2021-09-07 10:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 226f2f016f0f63b99083d7067bfd9e79 SHA-1: 10973f71f9e7f46ee9c1e20eb5750ad6b8155ae6 SHA-256: 5deaf2aa193037af5808cec5412cce5b0fbaf960e4a68e3d0269758188b62436
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish users or lead them to further malicious content. The document body is heavily obfuscated and appears to be non-readable content, further supporting a malicious purpose rather than legitimate document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0f73448c4---kopevajowejob.pdf In PDF document text
    • http://universalestetic.com/userfiles/file/guvize.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e874f41961---fujureg.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16085570da5dcf---95298419439.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/68911979176.pdfIn PDF document text
    • https://laserbeautymachine.net/d/files/32368471899.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9052d3e06---fezetipimivu.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/36345783632.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/81677baf0262844df5d0e4c6fd73456f/merilepapizuzitebomolegot.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/finev.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/9b6e2332a35603296842ead6131b784c/wezik.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bcabca9a296---xapobisusoxapit.pdfIn PDF document text
    • https://projetovm.com/uploads/files/78231092227.pdfIn PDF document text
    • http://chromavials.com/d/files/83653564501.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/86031910197.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074223723dd9---61546549430.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/wozoxemut.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/wowegibukujumofigaxofeg.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7741d33eb---mutapefajaxiruduf.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/98978184515.pdfIn PDF document text
    • https://reklama71.ru/upload_picture/risegikegojofovogovojuso.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/8d44678ff465e4b2f1e9f787a983b8b7/95141861708.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/42874690217.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/ariqt3s8i26dft5ltks2bsb8p7/55252201685.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/wijinexufoguxewi.pdfIn PDF document text
    • http://goref.ru/files/file/88342248034.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/7e87f18b510b7fb2a74d9e197073d10b/vazota.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=poder+de+hecho+y+poder+de+derecho+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001178b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178B 10164 bytes
SHA-256: 0688ba2a30e922dc6a0e29e991f48c036278f080fd40a5516e82303b5c9fb1d7
font_02_sfnt_off00012e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E61 19568 bytes
SHA-256: 3e7eeb61a1c1f49a12098956ac6cd389a7e08d127ec489ae63cba13b8b095e95

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