Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceea333dd1823fe0…

MALICIOUS

PDF

90.9 KB Created: 2021-08-06 12:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1cf818b8c5992692a9e685628f5e37fb SHA-1: 0a0ba033b48cb2171f36d044e069a483fc659b35 SHA-256: ceea333dd1823fe0e10736d040cddd7994b7e4d14d9f86bac0ac8fda8da36615
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/296937702cf62b0bd0f015400c95981c/87033152976.pdf In PDF document text
    • http://drsuthichai.com/userfiles/files/rufikulatexuk.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/85790853866.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/76146127570.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/87643120054.pdfIn PDF document text
    • https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/24359170096.pdfIn PDF document text
    • http://alanurturizm.com/rsm/files/zokizuvig.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/xakumesusajaja.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/5617201109.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/wakabumovolanafawexogixuw.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607981cb6f47b---27756580767.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/lonjfpeoejodpmnknnrgconlag/fumisag.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/84825867597.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16103d20e3b1fa---332520848.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/37958181362.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/8fe47a04af345c0d121d1c71e6f6222f/95111606923.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///9049429035.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cb658285e---59965023952.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/43305729795.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ddb379a3417---86140317347.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780cb241d66---19661975708.pdfIn PDF document text
    • https://www.nhabe.com.vn/ckfinder/userfiles/files/tubapubizofejonila.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/94385539600.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0ccbe7290---wiban.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/d9ec002b56bc1a38dac0e216b8950852/87576259536.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=present+perfect+simple+vs+present+perfect+continuous+printable+worksheetsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42E 17328 bytes
SHA-256: 6f18c5efdab51af56636955f32ed2350b8a34f9f527ac734f7051411beaa3ec3
font_01_sfnt_off0001115e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115E 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_02_sfnt_off000126da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF1 11232 bytes
SHA-256: eafe92615114aa3fcbbbe47167b1125353cd1a69f765445a780be17f3e489521

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