Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db0d0be86ec38dd…

MALICIOUS

PDF

89.6 KB Created: 2021-09-15 18:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d35a5a4ecacb18ec29e7560b34be637b SHA-1: 15dcc1f34f2e15c83249007efea1fe1bbef3aa53 SHA-256: 6db0d0be86ec38dd54426faf8a7ca8aa3c992c3771f475ec34996dfb86c7b47e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external links, some pointing to compromised WordPress sites, suggesting it's designed to redirect users to phishing or malware-hosting pages. The presence of embedded JavaScript further supports its use as a delivery mechanism for malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://nedirajtebosnu.net/userfiles/file/rekavirakerewuse.pdf In PDF document text
    • https://zivotzaokny.eu/res/file/76081721340.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210906033109671302y1n0il.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/358fc03e1afc4eb7a1ec4fd63afc470b/85144208139.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/xavonokejoluzolafonobepuw.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/66039589601.pdfIn PDF document text
    • https://democv.associasuite.com/imagenes/contenidos/files/wofobalija.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/53vmgq2grsha0ab871s1hc6ed4/tugogovudujeliledimavar.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/tadatojirilotewatovoxegez.pdfIn PDF document text
    • http://centromp.it/userfiles/files/85494501970.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/161382912a42fa---27885721407.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/40277260216.pdfIn PDF document text
    • http://graczeonline.pl/userfiles/file/94498329257.pdfIn PDF document text
    • http://knipia.com/userfiles/file/mifozefalo.pdfIn PDF document text
    • https://maffart-guy.com/userfiles/file/92904436779.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/8135836175.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/70194210728.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/dulexelavirenumis.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/44232138642.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/velonitenafiwudinidula.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614007ce518b8---74635724799.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=best+android+blackjackPDF 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_off0000fb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001139a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139A 10776 bytes
SHA-256: a49264d8c03898abbbb6367a8ff98daf14fd11b9a8ebab60fee987846cc4c9b5
font_02_sfnt_off00012c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C86 17296 bytes
SHA-256: 7b8d8d6600444aee3c65263e5eeb1721ed79dc59cccd4dcbc6a994e1426f14b8

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