Malicious PDF — malware analysis report

Static analysis result for SHA-256 dec00fd4e42d9404…

MALICIOUS

PDF

82.8 KB Created: 2021-09-24 04:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1b7005c758209d0cf8e8c587bb6d7b77 SHA-1: b13ebb05c40a7cb062d90a89e87bc8091a88ff50 SHA-256: dec00fd4e42d940475d30bacd2a418e60b993660499faf3af7c4b8d1586ebacd
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to disposable hosting or compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rizufotovuvexo.pdf In PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a8697116f2---20084829105.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/60289473543.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ced98868e1---51002187070.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202109091214328305.pdfIn PDF document text
    • http://apvn.info/userfiles/file/38482704616.pdfIn PDF document text
    • https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/43469238048.pdfIn PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/javipoludalofobikegik.pdfIn PDF document text
    • https://nada70.org/userfiles/file/womosarapoluv.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/22127037749.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/95248930811.pdfIn PDF document text
    • https://semangkabiji.com/contents/files/13907478215.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cf838263f5---mozodobobiretul.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/wotitowamabedijifexubeki.pdfIn PDF document text
    • http://tuivaivietnam.com/uploads/files/7831962049.pdfIn PDF document text
    • http://lactopad.com/uploads/files/25447712646.pdfIn PDF document text
    • http://cichanski.com/Upload/file/najimu.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/mowegazesovuvuvupe.pdfIn PDF document text
    • http://philipsphotographystudio.com/tusiru.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/jopomaxivokuxo.pdfIn PDF document text
    • https://uhcp.com/editor_upload/file/pikazimujakusafik.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/39738512734.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/19080000627.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1614bd57ef2f22---jawitekuweno.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1614094fddb890---49996223685.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=rsa+securid+software+token+for+androidPDF 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_off0000db03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB03 10744 bytes
SHA-256: a8506f0fb8684010cb651ecf6d3f3661f71253f0347a9b450ae6070bc13dde80
font_01_sfnt_off0000f3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EC 18692 bytes
SHA-256: 60792ab397af30f25b30c8308effe0a9de333446d253521335b3ef6863b1d945
font_02_sfnt_off00012505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12505 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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