Malicious PDF — malware analysis report

Static analysis result for SHA-256 24785c9300b5ab49…

MALICIOUS

PDF

83.1 KB Created: 2021-06-28 07:57:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e02895993c1138308daecc0853afddb8 SHA-1: 5e639272d618cfa8091d328fb36df828e8b5ce19 SHA-256: 24785c9300b5ab4934328260ef8d29ce8f5ede1f83ecf127c857f10e77991886
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a UTM term in one URL indicates an attempt at tracking or campaign organization.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=dark+bowser+coloring+pages
    • http://softwarefactory.nl/images/file/mirusejenozadeselu.pdf
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/7a90b494cfbf8a335d17020525efb2e0/38523694177.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/382308126f8118149bd273968df1ba92/pidirufogax.pdf
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/b8ba54b3586127a1b29d3eebc7d6af37/42449438805.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077989238bff---tovapilaz.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1ef8317c4---xaxijujex.pdf
    • https://pypconsultores.mx/userfiles/file/52729979169.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c17141b8e85---ripojag.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160afdf6c76592---mivokimawuwo.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/mol2jmvc46olp5pmndoegjgub4/pewutuxipezurejasij.pdf
    • https://planet-for-events.de/userfiles/file/53479241070.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/rde8tb9ohd3k1lv72nqedsg11k/lajaxuti.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/e36ed4d9c71e14f4b5d19094d7a1ccc0/zarex.pdf
    • http://klefmarken.se/upload/file/83199876541.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080361680f96---pixoku.pdf
    • https://bauarch.bg/files/93188841339.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738c9636c03---jobidebirututaxiwenewax.pdf
    • http://hilimall.ae/uploads/files/40199644429.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f09939616f---85079302337.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/7b8deee7a5746762b739398751529600/nomagizebinumafuwavakisaz.pdf
    • https://cristalparkhotel.com/ckfinder/userfiles/files/muzanofigisadamegosunopu.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0a8835df---55705426417.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd15642e7c---19625270517.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_off0000e10b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE10B 16792 bytes
font_01_sfnt_off0000f91d.bin
88e8c28ea8ebcb3c75b0383794081af7049dcd26abcaa15ddce2b93e151602a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF91D 17212 bytes
font_02_sfnt_off0001266c.bin
aaebbb2fdaba59e91d83032043bc7aa6c095dc67cd07de31c7af182c86bf2f96
pdf-font-stream PDF embedded font (sfnt) at offset 0x1266C 10768 bytes