Malicious PDF — malware analysis report

Static analysis result for SHA-256 4802ec65f4b4320d…

MALICIOUS

PDF

34.1 KB Created: 2020-05-29 23:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b38fc6d10c4ca41d40bd64481cc1bff SHA-1: 9b2c5f1e424fb6fd2f68e41f9436eeb665df41ad SHA-256: 4802ec65f4b4320de784146c0acc5e777e6418f2820384d7867fc037e88b2696
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on domains that appear to be part of a link farm, suggesting a malicious intent to redirect users. The document body, though heavily obfuscated, contains text related to 'Bloons tower defense hacked unlimited money' and lists multiple URLs, reinforcing the lure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded URLs point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://sprayitnow.com/uploads/1/3/0/6/130604922/130604922.html#bloons+tower+defense+hacked+unlimited+money
    • http://therootsofsonnenblume.com/uploads/1/3/0/7/130739377/24860170ca0.pdf
    • http://smc-realty.com/uploads/1/3/1/3/131383823/pubovowitunaled-tixutumajefipe-musofopij-davix.pdf
    • http://noshcandyco.com/uploads/1/3/0/9/130969012/dazovugu_nofuj.pdf
    • http://jmchocolate.com/uploads/1/3/1/0/131070001/noxuralo.pdf
    • http://rentrite-ak.co.nz/uploads/1/3/1/6/131607363/sinad.pdf
    • http://mail.goodtimesatlanta.com/uploads/1/3/0/9/130969842/3b42f937004b06.pdf
    • 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_off00005acc.bin
beb50706bb5faf443d906686e6792524a84fff88d3b562ad015cac7c48496d6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACC 10280 bytes

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