Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a75c7355eb038a…

MALICIOUS

PDF

57.4 KB Created: 2021-06-06 06:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 08a77b041afa0401289ddde6b003e1e5 SHA-1: 68c605090ed22df806f5613a7d14ad7c70376580 SHA-256: d3a75c7355eb038a98932639f7ab961f96497ec824d9c573bea36b9dc5ff8d69
94 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to other PDF files hosted on compromised WordPress sites and disposable domains. This structure suggests a link farm designed to redirect users to potentially malicious content, likely for phishing or malware distribution. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8067

Heuristics 4

  • 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
  • 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://philabc.ru/uplcv?utm_term=hexxit+mod+paketi+1+7+10+indir PDF link annotation
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e56aa3d8e---devokigaguxude.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16089f7e7329ae---83618684245.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608702c9ae214---gedazagunasejalo.pdfIn PDF document text
    • https://kraftyz.in/ckfinder/userfiles/files/zobimidikalo.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/4155256134.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/zimepepafuxiji.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/1g4cmfffk3eg9i6bh9annbeg7j/73853069923.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/zusonazimebavidixoki.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/jujuvuxofesebubug.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/mekefejizo.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a675fd1b763---dedotovazujov.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fea83303c---38629139557.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/lugototixunili.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b52370ca04d---27731542972.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC791 5264 bytes
SHA-256: 439fe0c975ab2e08152c872dab45ac2516021d252ee7513e6566dd35d0c74c23

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