Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9a9215ce455fbb…

MALICIOUS

PDF

87.5 KB Created: 2021-09-01 22:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b80ef9f7434e9058009a5e778c03b7d2 SHA-1: 8e727a623c782de2a6d38555380ebeb2874635e0 SHA-256: 7e9a9215ce455fbbdb0bbc5385d0232037ea42d91d9536e7f1546266e49e1b90
164 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 compromised CMS uploads or disposable hosting, indicative of a phishing or link-farming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to distributing malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • 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.
  • 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://conviviodihera.it/dati/upload/file/wuguzovakir.pdf In PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/76275403683.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8ddb454cf---93183385178.pdfIn PDF document text
    • http://distributoram.com/files/file/tidenerexatosujab.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/nivijotipafulopu.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/13236417076.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/sozalifotef.pdfIn PDF document text
    • https://dolphinsolutions.net/ckfinder/userfiles/files/50826890464.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/xewisa.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608446c766f46---nugoxodulujilapu.pdfIn PDF document text
    • http://imi.vc/upload/files/wukav.pdfIn PDF document text
    • https://oferta.lt/i/File/jokikogevinotakaletut.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59463821222.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/b5f3bb213fcb5b362c7b4b7e0a03bbf9/39790166958.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/pexexezuxutoxiwa.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5267c16ac4---86187806663.pdfIn PDF document text
    • https://brod-plovdiv.com/images/vifiredomex.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-7-27/20210727222038346219.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/33737478601.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/vj0jvcesv9o0hqpumf9vmm607f/56985129115.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/3779f6bff0654ab6dd30bfb04f559c9a/12384412482.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161221c88391a9---danisezurosudiwufuju.pdfIn PDF document text
    • http://www.globalnautique.nl/upload/files/59730933754.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/41b85b1023ead249bc2157913da6f486/lunovuzejekamodivu.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cc5d7859260---58428629508.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/22901271604.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/94415272827.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=hot+hollywood+movie+2018+free+downloadPDF 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_off0000ed26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED26 18536 bytes
SHA-256: 01ef26bb4b8579ef28e510c78cede9b73355598fcb59ff6aa59cd50c61ba8234
font_01_sfnt_off00011d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D38 11212 bytes
SHA-256: 3a8a5ee1634d233e89102dfaf3e238fa49504f4255234ce2f3de873b9ffb562b
font_02_sfnt_off00013763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13763 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1