Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0578a1d46b88fa…

MALICIOUS

PDF

84.5 KB Created: 2021-06-30 01:08:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 131a892eb2cbdf7bfc8c7566c4217402 SHA-1: d69539bac15f47477bf55e0932a235eedc18fbe4 SHA-256: 1b0578a1d46b88fa7fb78523cf78820525e9ae2573621ced23f181a75fac68e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous URLs pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • 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://huntic.ru/uplcv?utm_term=education+system+in+ghana+pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606cadb430f0c---94438235928.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c13955e371---xezuzotim.pdf
    • http://studio-rivetti.it/userfiles/files/foxenuladegemuxurap.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/0igji5718c1ddvl5b5qj04p8bi/pilazonawobarutevaputo.pdf
    • https://dienlanhhonganh.com/images/pic/file/fatawixiwamovur.pdf
    • http://x04ydivan.ru/userfiles/file/23913627694.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cf146fd8d---12159724577.pdf
    • https://digireg.org/upload/32538974919.pdf
    • https://villanakarin.com/userfiles/files/jimijikokoben.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/31205c9abe209d72e3840f5ecc9454a2/gofogad.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1e288b923---soxisaxelafoverebizu.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/aafd3d79f4f3b2e51b48128479b10808/dabevazenuzozesanom.pdf
    • http://charivne.info/images/file/42579460874.pdf
    • http://billsky.ee/files/file/33470555861.pdf
    • http://www.annaleehuber.com/content_files/file/78114291504.pdf
    • https://5uempat.com/contents//files/92949799058.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729e93db0e9---44263744086.pdf
    • http://neoneofitou.com/ckfinder/userfiles/files/kejamirunozenero.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3886c7ec0---nowaborititekomo.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/i0hmgtc1eed1om3tj822jjaav0/97309688517.pdf
    • http://chiaranannini.com/userfiles/files/ratugaduwerelesabixugoga.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/e1cef3731e50cff3930f4cd5cdef1f50/36658260964.pdf
    • https://signika.pl/Upload/file/81299927977.pdf
    • http://kingsfinancialconsulting.com/userfiles/file/betivupurinekip.pdf
    • http://aftckwt.com/uploads/file/gunigokotedotivibemizaw.pdf
    • 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_off0000e91b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE91B 16792 bytes
font_01_sfnt_off00010132.bin
0147822c4f2bec4e63a200ba6530f722dd38bb559a9ff3f1f01e0dd4bc34a2ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x10132 11116 bytes
font_02_sfnt_off00011ac8.bin
6e01f32de4095bf9060887cf75555cbbff757e1c3f9e94a992b019b5ee79bda7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC8 16320 bytes