Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ed98f96dd24abf…

MALICIOUS

PDF

114.4 KB Created: 2021-09-20 10:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 92d0b8b32f3b685b57392011bf15c0cc SHA-1: bdfcd84270b09effc4a7245c1c2d4ae50757bcf9 SHA-256: 68ed98f96dd24abf4755e0c10b5a78de10188cd04b5a33148317d5d8292cc80e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised or 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. The presence of multiple compromised CMS upload links further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://bbmeti.it/userfiles/files/62701159708.pdf In PDF document text
    • http://h-n-s.net/userfiles/file/dabiv.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137dda35ba6b---27082543677.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/wixeserupinozo.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/72400639070.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/1659460837.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/wasotozefinuxenovujuzag.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/45181585235.pdfIn PDF document text
    • https://cometgroupinternational.com/ckeditor/ckfinder/userfiles/files/62797121623.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/89388703952.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/1af1bd4233d62f3d5d85df4b5d5b44aa/zifegubatogela.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/53652186290.pdfIn PDF document text
    • http://thainightjob.com/ckfinder/userfiles/files/95818646764.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba9e938776.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/guwunategebopagad.pdfIn PDF document text
    • http://akademibt.com/resimler/files/bawosukizuvinotup.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/laxipixib.pdfIn PDF document text
    • http://pet.nfe.go.th/m_site/ckfinder/userfiles/files/48320066141.pdfIn PDF document text
    • http://bio-scan.com/userfiles/file/8200522000.pdfIn PDF document text
    • https://speculatio.in/userfiles/file/75169839919.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/lilugexorujufagabaj.pdfIn PDF document text
    • http://xyr59.com/filespath/files/20210913210556.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/7d4a2605d86d049708b8cd5db6df33eb/menevofagagowe.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/143d9e5ee3ff1bf9cf38f678ea410b0d/9651679775.pdfIn PDF document text
    • https://iphastkala.com/userfiles/file/goxepudegugetisi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=skam+italia+season+1+english+subtitlesPDF 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_off0001504b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1504B 10916 bytes
SHA-256: bd4b3149bc4ebb43f2f30948bf9ed3a37d020126a0bda2d1d7717feaff11fa47
font_01_sfnt_off00016964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16964 21820 bytes
SHA-256: 5cf81b2bef86220383c97dd938783311d564572d0cea89e7a135f950523683d3
font_02_sfnt_off0001a37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A37B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1