Malicious PDF — malware analysis report

Static analysis result for SHA-256 554648aad753b576…

MALICIOUS

PDF

89.9 KB Created: 2021-08-15 21:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 18cbc64fafec99526127f29c35763314 SHA-1: 30a1af9b8ddd8f777022f5e2cf5ba61268847be7 SHA-256: 554648aad753b57624dff48be988ad36f1197fa69821ea0b44dbe87392ded312
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further malicious activity. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/a022ba0e4abb7d09e9478bead3c69303/44466923732.pdf
    • http://marcobernini.it/userfiles/files/tefedatogofavugagulebu.pdf
    • http://csc0512.com/userfiles/file/20210607155022_m7vk9v.pdf
    • https://cometsecurity.in/admin/userfiles/file/neporoseseg.pdf
    • http://zatexpress.com/upload/userfiles/files/72840276640.pdf
    • http://bhs-class1957.com/clients/35434/File/tifugidisi.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a38fb3ea912---majimategez.pdf
    • http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/sejepafem.pdf
    • http://skyline1968.com/clients/74864/File/fidevodilidusi.pdf
    • http://childhood-matters.com/clients/49507/File/3666310925.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/vre14bnbd7cva5sbta36knrl7h/subovemarofe.pdf
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/modawarolopupaseg.pdf
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/guwuf.pdf
    • http://nuestratierrapremios.com/campannas/file/vikamalebora.pdf
    • http://pfmconsulting.org/survey/userfiles/files/kebarekovelefi.pdf
    • http://roxburyhs1987.com/clients/63080/File/mefogonafotovawobo.pdf
    • http://zigzagontwerp.nl/sites/default/files/file/birepazofekinajosotabiz.pdf
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/90101220334.pdf
    • https://bdaudit.ro/userfiles/file/40287101020.pdf
    • https://alarrabnews.com/images/content/content/file/givanatasadawedikijoz.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/55bfd290b2bc047a56b22bde97fc9dd6/44132783421.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5165380d6a---65855565459.pdf
    • http://musikpark-live.de/userfiles/file/pedijirisipomuv.pdf
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/vidimometasogivaguziv.pdf
    • https://spacio.hk/attachment/file/nozaledofedegevezibum.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732eac1207c---remijizasigutegaxew.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=hoja+de+respuestas+del+test+de+raven+escala+coloreada
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb85.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 16792 bytes
font_01_sfnt_off00011397.bin
778a004e81db2bdb87f9f48a42cd5f3920d7aa11d2a4608ba18954ee28b49f15
pdf-font-stream PDF embedded font (sfnt) at offset 0x11397 17148 bytes
font_02_sfnt_off00014089.bin
99d33b72342c33952ac2ffc891b6042d95706c6a4493f39afed20750ea0daec6
pdf-font-stream PDF embedded font (sfnt) at offset 0x14089 10700 bytes