Malicious PDF — malware analysis report

Static analysis result for SHA-256 e508316218b6b461…

MALICIOUS

PDF

89.1 KB Created: 2021-10-06 12:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bc6668da42b47cfd22e5eb2713c8e3ed SHA-1: c73282bf802436a1ea94f764b04b1c3dad44004d SHA-256: e508316218b6b46186b2182d1de4ca9bcee8fb3b9d3386d5072efecae7aaa96d
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains, indicating a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. The presence of embedded JavaScript (T1059.007) and the nature of the links suggest a phishing campaign (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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 http://infinity-pro.ru/userfiles/file/wixez.pdf In PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f90de9161a---bepazugomonebe.pdfIn PDF document text
    • https://resepangka.org/contents/files/9377814290.pdfIn PDF document text
    • https://allora-tour.by/var/upload/file/59947032804.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/4501891303.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/11382505875.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/wofixoramabobanukujemat.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/subixus.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/rozav.pdfIn PDF document text
    • http://hla.vn/upload/files/kidibixozafuzerizonugupam.pdfIn PDF document text
    • http://hoangminhsaigon.vn/@dmin/js/ckfinder/userfiles/files/vikomatun.pdfIn PDF document text
    • http://th-hl.com///upload/files/32356565611.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/javerasejiwixelumovonorol.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/58919872181.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/53709736405.pdfIn PDF document text
    • http://landpas.pl/upload/file/dobidajivusekowavalewid.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/zabuwevevor.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/49368643359.pdfIn PDF document text
    • http://motovelo-nmsk.ru/userfiles/file/kulowosunonewamaluvix.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/2d6dba46ef1bc41ebede840c3723af86/dimisuvaginevimidilepe.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/nuxevofipusum.pdfIn PDF document text
    • http://elektron.be/public/userimgs/files/togoniwepolaxujorato.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=correct+format+for+a+business+letterPDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/74870765670.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/zolilu.pdfIn PDF document text
    • 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_off0000f1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CF 10768 bytes
SHA-256: e2bee971af0508460a0e1e28148530aa485f5b3b0820795e3c899a2570dab57a
font_02_sfnt_off0001229b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229B 20204 bytes
SHA-256: 0c525e00a0ebac94ed7288da60efc4b0b3d6f49651ceee35de2172fd73e328d1