Malicious PDF — malware analysis report

Static analysis result for SHA-256 260f8382dababb8f…

MALICIOUS

PDF

133.0 KB Created: 2021-09-06 02:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7490b61e895310ba99ab344fbd2357ee SHA-1: 4e3237f1dfa4fccfbcdb092c7cc76553e39974cf SHA-256: 260f8382dababb8f72efa70fd5aa8f556514e99d219400af8a099e72a1319a36
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, indicating a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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 http://zae.me/datafiles/file/30712995310.pdf In PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/9d5nhs2h8hej097fri40vfvon0/84479716043.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d21a4520d5---sitijubosuzepola.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/tisevigomupaj.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/fivilawidegavej.pdfIn PDF document text
    • http://dichvubaove.online/upload/files/datekixojubewi.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd0eb9a87a---rexudabejesejasanuniwelaf.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210825201342272206.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3f8875b3f---rezewavetezewe.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/walodomamamevalu.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c129ce3baee---kexadime.pdfIn PDF document text
    • http://ibb-online.ru/f/file/204840614.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/95080474643.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/batovivawezu.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6552fdeb89---telujikurexujowu.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b9148b533---rugozowiboxevovulab.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/98973384659.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/juvajuxaxoxus.pdfIn PDF document text
    • https://digireg.org/upload/kumolalu.pdfIn PDF document text
    • https://dpmceramiche.it/file/vavula.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/69404981379.pdfIn PDF document text
    • http://walkercombsfamilyreunion.com/clients/d/df/dfd517ab040340b2551da60fba195f5f/File/63253098804.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0331d34ea---25556465703.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=les+maladies+cardiovasculaires+cours+pdfPDF 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_off000197ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001afcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFCC 25028 bytes
SHA-256: 1e2412d80d67e60d882c6e490925d53a8534623213e81e9993db214c1874c463
font_02_sfnt_off0001ed8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED8E 10700 bytes
SHA-256: cb78f26cfe7189600e21408084d438085e696c0a129cd1f7ff1c8c3e65d0ef45

Open this report in the interactive analyzer, or submit your own file for analysis.