Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ca14d8edcc33b2…

MALICIOUS

PDF

41.7 KB Created: 2020-03-13 09:08:57 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 68e6bdb8cf020baa71f42f9a9db3eca3 SHA-1: d95332e3333ead3b2e2e058acef26952b5e92c7f SHA-256: c4ca14d8edcc33b2cb3aaeb304bc86cf52bf949b7ca791e7ab5bb44060e53269
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body also contains embedded URLs pointing to various domains. These links likely serve to redirect users to malicious websites or to manipulate search engine rankings. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://i05g5.salon225.com/uploads/1/3/0/6/130639544/130639544.html#best+research+poster+examples PDF link annotation
    • http://crossroads-studio.net/uploads/1/3/0/5/130588565/361765c082.pdfIn PDF document text
    • http://www.mcfaddenranch.com/uploads/1/3/0/2/130271011/69b7e6d95bba.pdfIn PDF document text
    • http://hostmaster.bathgatewayoutandabout.co.uk/uploads/1/3/0/6/130604804/5b0d027997e2b.pdfIn PDF document text
    • http://realestateofficemaster.com/uploads/1/3/0/6/130604826/kumaguboduzeto.pdfIn PDF document text
    • http://pacllc.net/uploads/1/3/0/4/130478314/7547649.pdfIn PDF document text
    • http://eventdokters.nl/uploads/1/3/0/5/130543351/2810755.pdfIn PDF document text
    • http://hostmaster.caravaningshow.pt/uploads/1/3/0/6/130620234/052c5b2886.pdfIn PDF document text
    • http://whm.lullabylinks.com/uploads/1/3/0/6/130620321/jezisozesipuda.pdfIn PDF document text
    • http://friendsofkreischebrewery.org/uploads/1/3/0/5/130590661/lufuzavalikebujopoko.pdfIn PDF document text
    • http://humanizationforeducation.com/uploads/1/3/1/1/131164311/01045e01f3122d.pdfIn PDF document text
    • 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

Related samples 4

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_off00007b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B76 7912 bytes
SHA-256: 6c685f940c7822c1377371c963a0cef96b071e5083340942e1d6ff59e28ef190

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