Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb74e999c8b8ef5…

MALICIOUS

PDF

79.9 KB Created: 2021-09-05 07:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3384a0f22b8cfb43bf88dcc67d3abb59 SHA-1: 528b60e2a38e17314f3ba200cdf5c5d503202c0f SHA-256: eeb74e999c8b8ef5df2988601d3cd22d4348c5ccd0937335ac7248949fdc2fdf
204 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple links to external PDFs hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. The 'Browser extension / update installation lure' heuristic strongly suggests the document's intent is to trick the user into downloading and executing malicious content by masquerading as a necessary update or plugin. The embedded JavaScript likely facilitates this lure or downloads a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160800b3dc0938---60309189077.pdf In PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e018aaf75---vekodo.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b3b3748707431ccb8ad2bd762461c27c/67271740735.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d9c0e84d6---24354997692.pdfIn PDF document text
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/gajebobunenigafotedipune.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/f9dbe838aff14e0b6eb69b2edd13b3b3/tapiduzimiwaba.pdfIn PDF document text
    • http://sciattella.net/images/file/pakowolomotevini.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/161334dc38f9d9---22468693784.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ee15decb25c---lajufevinatubixawivomisaz.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/ba587f2248836930b23e2854e6c34319/lejulikusakuzawifosup.pdfIn PDF document text
    • http://temple.mo/userfiles/file/90883027595.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/3c1a51d4dc15ff36654cb0215f67f8cf/patowez.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/lebadesemesi.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611afa470184a---36840644808.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/17072842563.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/juwuxatesolejurubigoxu.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/75464461123.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec39ad02a2---28087012636.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/mufiwonasefegivugubosumip.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/13551c3e36e2d3bcdd0583687a6d82b1/rebak.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/majobukofodojunez.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/5ac01793fcf91d4ae22941af04389da2/61071032536.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134157f98e0b---3965792583.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=compress+pdf+size+300kbPDF 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_off0000d447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD447 10864 bytes
SHA-256: 89e838167aac648d2a3d0342908525ea213eb8c4c2d9fa457111e6d48081b7bb
font_01_sfnt_off0000ed34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10546 17744 bytes
SHA-256: 4ef550befd7573ac6bd178c2e2bf1be53dd2a3915276a5461654131812cdf46f

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