Malicious PDF — malware analysis report

Static analysis result for SHA-256 18863dbe2fe07107…

MALICIOUS

PDF

52.0 KB Created: 2020-03-11 13:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: eb5cffd7c12e4ea13e5a001150f36683 SHA-1: 3d408fcfacc8c66013d9f3882cd0a4d717adebce SHA-256: 18863dbe2fe07107d0556c4ccc7fc74a814a4fc436fc67fd73ec8c6c66ea18be
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs likely lead to malicious content or are part of an SEO spam campaign.

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://93ugs.salon225.com/uploads/1/3/0/4/130436121/130436121.html#convert+file+autocad+to+pdf
    • http://hostmaster.ashleyfencing.co.uk/uploads/1/3/0/5/130590392/7540749.pdf
    • http://amgonline.info/uploads/1/3/0/4/130476242/wiwuzo.pdf
    • http://www.turnernco.com/uploads/1/3/0/2/130273814/wutosexokareti.pdf
    • http://www.filmone.ca/uploads/1/3/0/3/130312952/zeporeda.pdf
    • http://www.fyndmycasa.com/uploads/1/3/0/6/130605190/9b454c75eff5e8.pdf
    • http://darellesigpoodles.com/uploads/1/3/0/4/130435803/luxisedomaxo-mileb.pdf
    • http://mindfulneuropsych.org/uploads/1/3/0/8/130874389/1335717.pdf
    • http://www.pullingjunkies.com/uploads/1/3/0/6/130604312/kutolibezaboradas.pdf
    • http://chloehoff.org/uploads/1/3/0/7/130738720/zujivebodapujaworuwi.pdf
    • http://stumpergasse.com/uploads/1/3/0/6/130620556/sagufakoj.pdf
    • http://geneushealthaddictiontesting.com/uploads/1/3/0/6/130620763/eaf29b1.pdf
    • http://worldwidechatsupport.com/uploads/1/3/0/6/130621304/a2b4258de6bd0.pdf
    • http://www.jchschoirs.com/uploads/1/3/0/3/130323516/jatekabesitabenugi.pdf
    • http://bluewatersw.com/uploads/1/3/0/4/130476043/kosiro.pdf
    • http://www.tmhairco.com/uploads/1/3/0/9/130969427/ledebupuvil_retatawumuxaku.pdf
    • http://darrenskitchen.com/uploads/1/3/0/2/130271094/521971.pdf
    • http://shelfstalker.net/uploads/1/3/0/6/130603753/lajuzuwewutos_weketavuson_pefipoko.pdf
    • http://rlx.space/uploads/1/3/0/7/130776370/419415.pdf
    • http://thelevygroupoc.com/uploads/1/3/0/3/130323818/gotuluzalonarekatamo.pdf
    • http://davidreider-photography.com/uploads/1/3/0/5/130551081/1900319.pdf
    • http://www.camdenlanewayproject.com/uploads/1/3/0/5/130588210/devojifixiwofinifafi.pdf
    • http://ballroomcentral.com/uploads/1/3/0/5/130588727/rakigu_kutokaloz_juzerijurekira_nibuvabukinug.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008bbd.bin
e2d86af856aaae00bf3475d33f25baf8c81fdcf0e4eca8039024f5bdf37da819		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBD 8720 bytes
font_01_sfnt_off0000ad30.bin
a68ad206e6fa00de9a93bcd426264e2a948f22db9431d90be7110a1ae082cbf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD30 16076 bytes

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