Malicious PDF — malware analysis report

Static analysis result for SHA-256 99a071ef33af0975…

MALICIOUS

PDF

25.7 KB Created: 2020-04-11 14:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-09
MD5: bcb7e036079f90ba0dd415426903c315 SHA-1: 1f1e67ebe5484a6a1be591d0722a3018de50b8fc SHA-256: 99a071ef33af097591d9b47ad9b56bf1be792f0f4d8f505f33b341c28262a4af
134 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are dynamically generated and point to PDF files on various domains, indicating a link farm or SEO spam operation. The document body, while partially corrupted, contains text related to 'Les catacombes de paris' and the wkhtmltopdf generator, suggesting a lure to attract traffic to these external sites. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://sparkyourplanb.com/uploads/1/3/1/6/131636745/131636745.html#les+catacombes+de+paris PDF link annotation
    • http://trishaknightdesigns.com/uploads/1/3/0/3/130379164/turugasepawe.pdfIn PDF document text
    • http://desiredestinations.net/uploads/1/3/0/7/130739963/tewokazutudel-wazoledexobaxu-vatil-kujavenifiteba.pdfIn PDF document text
    • http://bestbidroofing.com/uploads/1/3/0/5/130588702/miwofowutagi_fusunuvesusasa.pdfIn PDF document text
    • http://hjernadeytt.net/uploads/1/3/1/4/131453036/8278567.pdfIn PDF document text
    • http://libertyhallwriters.us/uploads/1/3/1/1/131164358/pipol.pdfIn PDF document text
    • http://slumi.org/uploads/1/3/0/4/130435875/2256836.pdfIn PDF document text
    • http://ff1l.net/uploads/1/3/0/9/130969041/0ec2e7.pdfIn PDF document text
    • http://merchmagic.com/uploads/1/3/0/3/130313200/1ebac33a3a75.pdfIn PDF document text
    • http://feelsick.net/uploads/1/3/0/5/130589274/nadaxo_pixoba.pdfIn PDF document text
    • http://valestech.com/uploads/1/3/1/0/131070695/fa141.pdfIn PDF document text
    • http://philadelphiacommercialpainting.com/uploads/1/3/0/2/130289571/muloro_tutexixovefo_famitunetesa.pdfIn PDF document text
    • http://balihaidreams.com/uploads/1/3/1/4/131409474/tevasawituwowezaxado.pdfIn PDF document text
    • http://hilleke.info/uploads/1/3/1/4/131482819/2437d89a4da0384.pdfIn PDF document text
    • http://sweethorizonphoto.com/uploads/1/3/1/0/131070204/4901937.pdfIn PDF document text

Related samples 8

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