Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a63b78989362bca…

MALICIOUS

PDF

38.3 KB Created: 2020-03-11 09:40:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ba1dda04733d9a998b2a2ce527775a74 SHA-1: e496d05d0863aeb40d86ef2fc35bde1d08f96a5a SHA-256: 8a63b78989362bca8c97536d1edfe5a4779bd9c76e9d98c5773ef73a2b0e060b
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many of which point to PDF files with numeric slugs, indicative of a link farm. The document body mentions 'Excel 2010 advanced filter criteria formula', a common lure for users seeking technical information. The ML classifier strongly flagged this PDF as malicious, and the heuristic firings confirm the presence of a large number of external links, suggesting a drive-by download or phishing campaign.

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://kassie-nichols.rominastiebenphotography.com/uploads/1/3/0/6/130639222/130639222.html#excel+2010+advanced+filter+criteria+formula
    • http://www.yourpowertothrive.net/uploads/1/3/0/8/130874119/bajilis-buterodawanupu-bapejexufi-jizuwev.pdf
    • http://styer-fitzgerald.net/uploads/1/3/0/4/130488542/linavefajelo.pdf
    • http://www.inclusivenetballvictoria.org/uploads/1/3/0/7/130775211/luwat.pdf
    • http://bughunters.eu/uploads/1/3/0/5/130543545/72dba0ac7d44.pdf
    • http://manifestjewelers.com/uploads/1/3/0/5/130540146/wikotuvawevov.pdf
    • http://scalatech.co/uploads/1/3/0/2/130291592/9809572.pdf
    • http://tillsnuts.com/uploads/1/3/0/3/130379651/fujeponopuxogom.pdf
    • http://databaseperformancetuningasaservice.com/uploads/1/3/0/7/130739401/rifurewekotakef.pdf
    • http://aidanmanery.com/uploads/1/3/0/4/130483649/tuziraperanujon.pdf
    • http://missgojo.com/uploads/1/3/0/2/130273733/4162d26b.pdf
    • http://tcmr-advogada.com/uploads/1/3/0/7/130738710/d8c000ce58a1191.pdf
    • http://briansherrishow.org/uploads/1/3/0/6/130639558/9143379.pdf
    • http://www.68flooringoutlet.com/uploads/1/3/0/5/130539923/417627e569a.pdf
    • http://www.merchantkarma.com/uploads/1/3/0/8/130813571/6432588.pdf
    • http://sofrancefurniture.eu/uploads/1/3/0/4/130435546/vobid-wuxak.pdf
    • http://localistmarket.com/uploads/1/3/0/2/130289693/58c29.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_off00006c07.bin
d1d69a5c7c3b5a60224475bcc654a10b78ce0a835cbf6b0292046fffab1acd8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C07 8240 bytes

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