Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a2de8cf0807fa5…

MALICIOUS

PDF

45.5 KB Created: 2020-03-12 12:25:11 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e33534c89bda39a25d00671805756694 SHA-1: 506a256d8e462ff964eba0b24b7dca715c2e2f01 SHA-256: e9a2de8cf0807fa581201e1ed8446e8c7b04f7f286671553c5589406f8833d36
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF documents hosted on different domains. The ML classifier strongly indicated maliciousness. The primary attack pattern appears to be a link farm designed to direct users to potentially malicious content hosted on numerous subdomains.

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://lllbc.club/uploads/1/3/0/8/130813536/130813536.html#ideology+of+pakistan+css+pdf
    • http://www.starkviller.com/uploads/1/3/0/5/130545021/bevotatugegade.pdf
    • http://ekamniearth.com/uploads/1/3/0/7/130776727/turitim.pdf
    • http://mytraveltracker.app/uploads/1/3/0/6/130605482/bfe8fafb565e72d.pdf
    • http://mylonglocks.com/uploads/1/3/0/3/130324270/da7d7e.pdf
    • http://261.bpmtc.com/uploads/1/3/0/2/130272586/dozopenir-xomujupapefil-vologudiseteke-vudusakelowuze.pdf
    • http://judithgalasek.com/uploads/1/3/0/2/130288557/gexeredakakin.pdf
    • http://bancodetalentos.org/uploads/1/3/0/2/130273850/vugotumejujipe_vujubeginateg_telexo.pdf
    • http://pleaseexcusetheshirt.com/uploads/1/3/0/4/130490378/midibodejakezikul.pdf
    • http://akashachamberlain.com/uploads/1/3/0/7/130738661/gupazatazulo.pdf
    • http://www.prowl.tv/uploads/1/3/0/6/130603942/sagudoporeliki_nigagebivodub_rikekezibipi.pdf
    • http://kandacando.com.au/uploads/1/3/0/8/130813616/64bd9a9.pdf
    • http://www.lebonregistre.com/uploads/1/3/0/8/130874339/ed5359821a6b.pdf
    • http://mrncleaningservicescom.com/uploads/1/3/0/7/130740522/garijofobiwosulif.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_off00008aae.bin
ae7f4908b11abcd9139e8cb44973685241a440574120bae4a4c748b3666bbac8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAE 7928 bytes

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