Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3ceac9eddc6d02…

MALICIOUS

PDF

81.7 KB Created: 2021-08-15 18:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: db89218d33a03fdd868e04d2acd9199f SHA-1: 7a0e5e624e207a06fc8ee8b85009b2d5474c7c74 SHA-256: be3ceac9eddc6d02b21b13e6e0695d1aafffb32763676461a53a2cd67d72b695
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to download further payloads or provide sensitive information. The embedded URLs are designed to appear as legitimate document links but lead to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://electrogalicia.com/electrogalicia/recursos/archivos/witubozomoga.pdf In PDF document text
    • http://ashioke.com/images/library/File/53220856021.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/k18iuqbcn0fgauj6tkgnlnaeo9/58902265043.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fff8a74d2---pobudagidikusaj.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/249825716.pdfIn PDF document text
    • http://bacsiha.com/public/ckfinder/userfiles/files/56997557945.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f12c5b8fa4---geniweriveb.pdfIn PDF document text
    • http://www.celso.org/download/pajawe.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/xasovefogodizobi.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/gururojanudo.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/18043984873.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/o0pbh6em47pdnl758ht9s1hhm1/wozavi.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/80890699693.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/3cslom02encfspiejtbd5fbumg/38851466438.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/16181106911.pdfIn PDF document text
    • http://huyminhplastic.com/upload/files/57408902695.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/6077442611.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16075d5310db3f---48173233352.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/p68giss0b6440e89hi0r3l2d6u/74212321907.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608405b7dc5d9---vavafisugiwuvewiga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=computer+science+class+11+book+pdf+2020-21PDF 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_off0000da26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23D 11472 bytes
SHA-256: f805ef5aafde381864f51bbab9013bdd4d85ccad7bfac08ee26a3eb8cb1e7f0f
font_02_sfnt_off00010d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D41 16916 bytes
SHA-256: 43b9211bdf26b2d58c25eb8fae3f8af07197ae438d04326820f438185605c02c

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