Malicious PDF — malware analysis report

Static analysis result for SHA-256 f033da0d7dee8410…

MALICIOUS

PDF

38.5 KB Created: 2020-06-03 04:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae79b198ae022930cb4fe0d49e371b7b SHA-1: 54d06f927ee9b9ea21ddce39168e2e01fb8f8b73 SHA-256: f033da0d7dee841033f6f0898e1af775e95c0a23c8747b0446f209ea72f20afa
92 Risk Score

Malware Insights

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

The PDF document contains a "Sms peeper code hack" lure in its body text and exhibits characteristics of a link farm, embedding numerous external URLs. The heuristic firings indicate a high likelihood of malicious intent, specifically related to SEO link farming and the presence of external URIs. The ML classifier also strongly flagged this PDF as malicious.

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://14m.undesirable.us/uploads/1/3/0/7/130738830/130738830.html#sms+peeper+code+hack
    • http://jgflooringdesign.com/uploads/1/3/1/0/131071298/6360308.pdf
    • http://lightsoutelectric.net/uploads/1/3/0/5/130589218/gufojumejuku.pdf
    • http://totaleclipsewindowtinting.com/uploads/1/3/0/7/130775372/7056141.pdf
    • http://digitalleadsonline.com/uploads/1/3/1/3/131398488/pupufazamosejo.pdf
    • http://ascoconstruction.net/uploads/1/3/0/7/130739751/18c1a.pdf
    • http://everythingnaturalxchante.com/uploads/1/3/0/5/130543377/fesuvabapajorutiliki.pdf
    • http://rapturegoldmall.com/uploads/1/3/0/6/130621576/701753.pdf
    • http://14m.undesirable.us/uploads/1/3/0/7/130738830/terms.html
    • http://14m.undesirable.us/uploads/1/3/0/7/130738830/dmca.html
    • http://14m.undesirable.us/uploads/1/3/0/7/130738830/policy.html
    • https://debidipevod.files.wordpress.com/2020/05/mewudiz.pdf
    • https://lorimanugolu303520256.files.wordpress.com/2020/05/95406472004.pdf
    • https://molozujepaxu.files.wordpress.com/2020/06/2109567344.pdf
    • https://sudevoxe.files.wordpress.com/2020/05/ximevarujevaboxujujox.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_off00006c5d.bin
b898fc5bfa8c012e49ece27197858b114aa7500d5cb6fe8c4b0402eb51e818d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5D 10004 bytes

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