Malicious PDF — malware analysis report

Static analysis result for SHA-256 080a79f0cb951ca0…

MALICIOUS

PDF

36.1 KB Created: 2020-05-22 04:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34f5cebfcd72d7479ff308c00f085ac1 SHA-1: eceb074a5d9e976790b4bb470a56c22e00457390 SHA-256: 080a79f0cb951ca0ae0e82082506fd6c9986c2cfd8b51248166da47679207f3b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or distribution mechanism. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://premierife.com/uploads/1/3/1/4/131408117/131408117.html#the+tale+of+the+three+brothers
    • http://armonkfire.com/uploads/1/3/1/1/131164248/391501.pdf
    • http://mail.thesinglespoon.com/uploads/1/3/0/8/130874201/7899758.pdf
    • http://fortembiotech.net/uploads/1/3/1/1/131163949/genuxaxat_jekixatijol_mirexulejubivot.pdf
    • http://ribinsurance.wales/uploads/1/3/0/2/130289291/tebajozuwo-jojinewux-tesirer.pdf
    • http://wisecountyhumanesociety.net/uploads/1/3/0/8/130874001/lesuvodimenasixerun.pdf
    • http://socialmediabzz.com/uploads/1/3/1/6/131637109/nipumadogujupev.pdf
    • http://soida.net/uploads/1/3/0/8/130814483/vubetujurukejuw.pdf
    • http://dapwrites.com/uploads/1/3/1/8/131857000/regibijop.pdf
    • http://txoilhauler.com/uploads/1/3/0/5/130540009/7833994.pdf
    • http://partnerreach.net/uploads/1/3/1/8/131871532/kufow.pdf
    • http://edgemereestatesfarm.com/uploads/1/3/0/4/130483584/muxavifitakidogufubi.pdf
    • http://couplestherapyswi.com/uploads/1/3/0/7/130740048/vizunomebonokegidane.pdf
    • http://mypeopleindiandolls.com/uploads/1/3/1/4/131412491/xalidoxufu-muzapabi-zofasogu-sewef.pdf
    • http://mmacrashcourse.com/uploads/1/3/1/0/131069968/5540261.pdf
    • http://vbslawnandgardenservices.com/uploads/1/3/0/4/130483275/damufabun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f1.bin
46dbd307c98e5c0966f2d7ba1c565f73d8e312aa4d543c145bd18090f42df59c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F1 9764 bytes

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