Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a159f9eba11aed…

MALICIOUS

PDF

55.0 KB Authoring application: Adobe PDF Library 9.0
MD5: 003aa16db35fa2f9e36deb52bb3a0d59 SHA-1: ee5525150959af0b9bac28327353ecdae4ba0586 SHA-256: 45a159f9eba11aede34028726b6900841006ac70441f924a30c34a547c3df08b
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body itself is largely unreadable, but the embedded URLs are the primary indicators of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://papejumike.meessays.info/uploads/2020/01/27/xevimafufagej.pdf
    • http://younionstudio.com/uploads/1/3/0/6/130604333/3e99d84.pdf
    • http://theleawoodfamilydentist.com/uploads/1/3/0/6/130620665/jodifoka.pdf
    • http://mamabeardaycare.ca/uploads/1/3/0/3/130312985/7570300.pdf
    • http://cassidyturleysites.com/uploads/1/3/0/4/130476082/botimikugupex_fivuxelu.pdf
    • https://raromofax.weebly.com/uploads/1/3/0/2/130271240/9968751.pdf
    • http://vukawi.boltkomplekt.ru/uploads/2020/01/28/be4b6dfc2b6a3.pdf
    • http://xylitogum.net/uploads/1/3/0/4/130489898/kupoloz.pdf
    • http://sinadise.audiostart32.icu/uploads/2020/01/28/2966143.pdf
    • http://sogipuvus.familia-mebel.ru/uploads/2020/01/28/panugutilujofan.pdf
    • http://luisruuska.com/uploads/1/3/0/6/130620490/buxudaxigu_dekojezikufef_gemasope.pdf
    • http://muf.toutusage.com/uploads/2020/01/27/6983321.pdf
    • http://xer.galamosaic.net/uploads/2020/01/27/vufepelix.pdf
    • http://konu.kommmituns.com/uploads/2020/01/27/bb0b12ccf416cf8.pdf
    • http://soxutikis.efl.su/uploads/2020/01/29/6bb6b5bb66.pdf
    • https://putinafuda.weebly.com/uploads/1/3/0/4/130436197/xasemuzu.pdf
    • https://duredovopozot.weebly.com/uploads/1/3/0/5/130551054/1eda84cfe4.pdf
    • http://codycandycompany.com/uploads/1/3/0/4/130476168/jikaninujufofuvej.pdf
    • https://tajovabobusetov.weebly.com/uploads/1/3/0/2/130272233/38dd67.pdf
    • https://viziravojal.weebly.com/uploads/1/3/0/5/130590663/5706177.pdf
    • http://kinseyfire.com/uploads/1/3/0/6/130621654/gedobatikuvivawomaz.pdf
    • http://piwagexu.baikalist.com/uploads/2020/01/28/365a65e6b637.pdf
    • https://jozikufu.weebly.com/uploads/1/3/0/3/130379465/vopuwika.pdf
    • http://iloveacorns.com/uploads/1/3/0/2/130271161/xeliwibotovezaf_forasizizi_murixopi_ruvelezuzuge.pdf
    • http://humannaturefoundation.com/uploads/1/3/0/5/130544898/130544898.html#westfall+local+schools+progress+book
    • http://iloveacorns.com/uploads/1/3/0

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000173e.bin
cf30016aa31bafab8cf5e455be31e4d8f5073cd6216fdb6738c4b44fab946c74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x173E 8996 bytes

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