Malicious PDF — malware analysis report

Static analysis result for SHA-256 a15987bad89cc097…

MALICIOUS

PDF

36.9 KB Created: 2020-04-11 20:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9f4f7c17cc99b568a8ad7cbbb2d09233 SHA-1: f81737fdadb33f5e7454e91da5f2b3b02edc35f6 SHA-256: a15987bad89cc0979be1467ac92f1207ee3dcf6ccf59136ea535f2b9fff409e6
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified as a PDF link farm. The document body, though heavily obfuscated, contains a reference to 'Anime hunter x hunter chimera ant' and the wkhtmltopdf tool, suggesting a lure to related content. The ML classifier strongly indicated maliciousness. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://totallydreams.com/uploads/1/3/0/6/130640057/130640057.html#anime+hunter+x+hunter+chimera+ant
    • http://fortressministries.org/uploads/1/3/1/4/131406739/livafoniva-tapalirito-duvolamabofa.pdf
    • http://kilpailuopas.ratsastus.fi/uploads/1/3/0/9/130969313/2844771.pdf
    • http://whiterockbrewing.ca/uploads/1/3/0/7/130776341/660f3.pdf
    • http://williampfrench.com/uploads/1/3/1/4/131437350/164165c4.pdf
    • http://tomarwatersystems.com/uploads/1/3/0/7/130776291/6153862.pdf
    • http://dominiquehaddon.com/uploads/1/3/0/6/130603922/xovomulupunisa-dipedeseminez-pigir.pdf
    • http://heartsandhandshomecare.com/uploads/1/3/1/4/131409167/sakidoweleto.pdf
    • http://cyber-plus.net/uploads/1/3/0/3/130379681/ef2e5c579.pdf
    • http://prurigoguideline.org/uploads/1/3/1/4/131407226/f9630389d97e.pdf
    • http://kenkatie.com/uploads/1/3/0/6/130620565/bomoju-rolekumepalus-wuredikaganepax.pdf
    • http://maxretirementnow.com/uploads/1/3/1/4/131437538/9588315.pdf
    • http://acaciaroadventures.com/uploads/1/3/0/7/130738722/6214501.pdf
    • http://ninamire.com/uploads/1/3/0/7/130739529/8485259.pdf
    • http://mjartwork.com/uploads/1/3/0/4/130436080/dabobiwoxojexitus.pdf
    • http://dominiquehaddon.com/uploads/1/3/0/6/130603922/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006822.bin
a7ce83a886021e182de639f9e42742afee28eb3fab8e839c4596080826e9ec17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6822 8164 bytes

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