Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0eb14ff08765dc…

MALICIOUS

PDF

77.1 KB Created: 2021-09-04 15:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8c8637a28e258eb22eead695a14de66f SHA-1: f56c46b898ad92216ec83c3203d28c5c77d94152 SHA-256: 2e0eb14ff08765dcede4e82485bab832c346488cb3fa4265a34cfe4b1ba204a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many pointing to compromised WordPress sites utilizing the Formcraft plugin for file uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The structure suggests a link farm designed to obscure the ultimate destination of the user's click.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5110e1569---vabudazerenokezozape.pdf In PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40665699b5---7305290690.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/9e9t3rhgtgp7j4j7it2lkgite0/54026806967.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860f587844a---pagisosijobexulowazuf.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/vujopedidajirakopa.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1610d550a4811e---63425953543.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/sewatepusefewejad.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/5c5fc903488a8d94dc3a0300b5d7afb1/bopiju.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/56348508793.pdfIn PDF document text
    • https://cesiedizioni.com/userfiles/file/xixusuditutizax.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/pifitedi.pdfIn PDF document text
    • https://vicareyou.com/userfiles/file/40584157711.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/ledumowesomejinabovuvi.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/luruti.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/3122d816164b966f4f6692c55a9b5d46/molunawawij.pdfIn PDF document text
    • http://grandinspirations.com/clients/75274/File/93818856869.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/tasufelerixefumawegab.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/eem80tpiittp3gsq54hlt79uln/jerolupivubuwamimivopab.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/e307rqvilcupif2t6f6ebv008l/63673521732.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/19257423916.pdfIn PDF document text
    • https://wagaskar.com/media/41750392675.pdfIn PDF document text
    • http://delve-cr.com/uploads/68048700388.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e2765cbfb---64745784424.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=easl+cirrhosis+guidelines+2018+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_off0000c89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC89D 11388 bytes
SHA-256: 7d3ccd1c33d022bdab2d9630f23a1aec7a9871a8cbf6b55aa02b0f5f5d003a4d
font_01_sfnt_off0000e334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE334 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB46 16876 bytes
SHA-256: 7b76045eff053d0cb9598dea18ed913ba430f4b5c3d1e641e2a3fc9e26a932cf

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