Malicious PDF — malware analysis report

Static analysis result for SHA-256 547892d3f52ec273…

MALICIOUS

PDF

18.2 KB Created: 2020-04-05 13:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0997bb8b6e3549558b5e93e8060b3f22 SHA-1: cbf954d81396b705f60de142edcea1618cbede2e SHA-256: 547892d3f52ec2732d39c2f1af0f04f8fbdbbe6e07d1646dfb0b95a942fb299f
112 Risk Score

Malware Insights

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

The PDF is identified as an image-only lure, typical of phishing campaigns. It contains numerous external links, many pointing to other PDF documents hosted on various domains, suggesting a link farm or redirection mechanism. The primary URL, http://marquisetrent.com/uploads/1/3/0/3/130313398/130313398.html#solving+equations+with+three+variables+calculator, is likely the initial point of contact for the attack. No scripts were extracted, but the structure strongly indicates a social engineering attack to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9713

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 18 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://marquisetrent.com/uploads/1/3/0/3/130313398/130313398.html#solving+equations+with+three+variables+calculator
    • http://steffaniemsswayministries.com/uploads/1/3/0/5/130540159/b993a0ccbe47.pdf
    • http://pharmaloq.net/uploads/1/3/1/4/131453111/rakide_mifigiwidig_gixoruk.pdf
    • http://propinquityretreats.com/uploads/1/3/0/5/130550838/basokulor-rofugovoxepub-nowenebilutef.pdf
    • http://hunt-archive.com/uploads/1/3/0/7/130776828/gawusufubovezovuv.pdf
    • http://lynneknightley.com/uploads/1/3/0/5/130588850/konubiruzabag.pdf
    • http://dt-carpentry.com/uploads/1/3/0/8/130874671/zazitikigivusadasimu.pdf
    • http://attorneyjasonanders.com/uploads/1/3/0/6/130639251/jemebu-kojomisofiva-jevinufowen-nekin.pdf
    • http://healinghandsmentoring.com/uploads/1/3/1/0/131070637/580a3c86a3e90.pdf

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