Malicious PDF — malware analysis report

Static analysis result for SHA-256 191a28130018b07a…

MALICIOUS

PDF

80.3 KB Created: 2021-10-09 04:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-22
MD5: b984103b85c8ba720e7554cbce30fa6f SHA-1: 977a03ae595f48c801f2f87c471edefbefb24c7b SHA-256: 191a28130018b07a5f6374c49a122f24cbe73f70907c63ec6f4983cdd3645b90
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://talk200.com/admin/admin/uploadfiles/file/validuvodabo.pdf In PDF document text
    • https://fotografski-studio.kost.si/userfiles/file/rudusovelawinugakonupuwa.pdfIn PDF document text
    • http://freeorden.com/media/file/40418211456.pdfIn PDF document text
    • http://www.tecnobor.es/ckfinder/userfiles/files/molexegawomededosim.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161371e5539921---zazoposipivokatowepig.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/teluba.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/jubivi.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/80567821179.pdfIn PDF document text
    • http://decaldankinh.net/upload/files/51328229570.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/78406467662.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16154304e3d497---jerulaxevafeburojejodik.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/52234865867.pdfIn PDF document text
    • http://www.alborada.es/ckfinder/userfiles/files/38454803458.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/miwetatazekomijuzipopisaf.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/wasaxaleli.pdfIn PDF document text
    • http://keacg.com/upload/files/nudajexumukezivaditije.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/418r55jpd9gdgdk90su4v8ni7o/newenenukizuwesifob.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/13c9b15c7a3651426589377c4c5c094e/6492843947.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613c746135929---vutuwajilerajosepa.pdfIn PDF document text
    • http://zeamailer.zeapost.com/FCKeditor/editor/filemanager/connectors/userfiles/file/woxafuter.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/3b3d1354f7ab3d786e76986634630d97/11752297523.pdfIn PDF document text
    • http://mamolenasnc.it/userfiles/files/kisinimebeparexadifiregax.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/18768818453.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=income+tax+declarationPDF 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_off0000d5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B5 17876 bytes
SHA-256: d90c852a9794e5b1c27d56c1c9f21bb428c5d87e4e9b20ef87b2a77f45e4377d
font_01_sfnt_off000103cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CF 10416 bytes
SHA-256: 2d138b8a22f49b26ef18be176c1c6d0fb5fda1526912961bdc82fbbc3703f699
font_02_sfnt_off00011b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1