Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7992890e017f4ad…

MALICIOUS

PDF

82.8 KB Created: 2021-09-13 00:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e52134080f3bd1d78b08bd8f6a18bef6 SHA-1: b252d36f720a8fd5961b894a8db8c7834c5726d1 SHA-256: e7992890e017f4ad36c057c97448ea2cd44bf1af2f0b9e957ef8516505374f38
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it's a PDF link farm. The document contains numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to lure users to malicious sites. No scripts were extracted, but the primary attack pattern involves directing users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://crewmak.ru/uplcv?utm_term=ice+contact+android PDF link annotation
    • http://www.adarshvidhyasankul.org/userfilesfile/lipatisuvo.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/3717731068.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/likobuxebesidofolaf.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/48224389106.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210912_140240.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/63644879239.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7d0ddfe024736b2b0a975e75015599bf/3143131121.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161327fdec6e27---selonigerolamozojevuzupuz.pdfIn PDF document text
    • https://gcr.goldcrownresort.com/magazine_files/files/42126117967.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16131bae770b6c---lupibutuwegamejibizud.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/68109693573.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/finopibijatomonivesofas.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613252c359bb7---befusevatajivo.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7072ad82c---tugulijerogux.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/dedobiwotisivunumela.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/regetirof.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/mowig.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/89236318710.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/84579368971.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/51870360018.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/wurokolusaripawufifasug.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6cb65a99e---31869112193.pdfIn PDF document text
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/molujuzarurikot.pdfIn PDF document text
    • 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_off0000df06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF06 18372 bytes
SHA-256: 3753ae869af6ed4f9512f99669d05daf6df7aa81dab16970201c5113d32c2385
font_01_sfnt_off00010ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF4 10100 bytes
SHA-256: 0e3ff98914ba870ea5770da573bdc76198aa9c7a8c69d9129b4c24d4f94e28de
font_02_sfnt_off00012593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12593 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.