Malicious PDF — malware analysis report

Static analysis result for SHA-256 385a3fc91b0c817b…

MALICIOUS

PDF

19.5 KB Created: 2020-04-04 07:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fd576fadaa430eab21a12785dbcfa799 SHA-1: 6708732323e830c917c1d3456ac61e8c9f274591 SHA-256: 385a3fc91b0c817bfea08258cce53489c0823b58c5a8dd6f390dd92688eb95dd
112 Risk Score

Malware Insights

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

The PDF file is identified as malicious by an ML classifier and exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing an action trigger. The document body and heuristics reveal a large number of external PDF links, suggesting a link farm designed to direct users to potentially malicious content. The primary URL http://rachelawriter.com/uploads/1/3/0/4/130476069/130476069.html#conceptualizaci%C3%B3n+y+filosofia+de+enfermeria+conclusion is likely the intended destination for the user's interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9719

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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 19 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://rachelawriter.com/uploads/1/3/0/4/130476069/130476069.html#conceptualizaci%C3%B3n+y+filosofia+de+enfermeria+conclusion
    • http://mesquitemediaclassic.com/uploads/1/3/0/9/130969254/4874753.pdf
    • http://brookebarberfit.com/uploads/1/3/0/7/130739936/9451096.pdf
    • http://brishoresceramics.com/uploads/1/3/0/8/130813840/rosoxutedelo.pdf
    • http://www.newcreationfitness.net/uploads/1/3/0/9/130969599/c2f1b17e1.pdf
    • http://cninc.org/uploads/1/3/1/1/131164266/teninulemiretas.pdf
    • http://austincrouch.info/uploads/1/3/0/7/130740338/pevuxufupu_dezawu_vibewudepaj_bivufufo.pdf
    • http://thephotontrap.com/uploads/1/3/1/3/131383751/nuvimom.pdf
    • http://tpcone.org/uploads/1/3/0/3/130323794/popizaxejim_bisedavamol_wizisaf_befamizopixob.pdf

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