Malicious PDF — malware analysis report

Static analysis result for SHA-256 11cbf8c189c1dcbe…

MALICIOUS

PDF

36.4 KB Authoring application: GIMP
MD5: c6f36aae5172d424b1442a16858bcbdd SHA-1: 64a43cdd4862254c0ddb1399c509476a1bc15ff8 SHA-256: 11cbf8c189c1dcbefb44c1f2085feed3c0bf81a95a546ea85145f2c137e508a6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO spam campaign. The document contains a large number of embedded URLs pointing to external PDF files, suggesting an attempt to redirect users or manipulate search engine results. No scripts were extracted, but the presence of numerous external links indicates a likely distribution or redirection mechanism.

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.
  • 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://rhsgirlsbasketball.com/uploads/1/3/0/3/130379117/2616658.pdf
    • http://xipebeb.adwords-about.com/uploads/2020/01/28/8684625.pdf
    • http://the-fullcircle.com/uploads/1/3/0/6/130621046/vuwerirenul.pdf
    • http://queblesolutions.com/uploads/1/3/0/6/130639406/735843d7d8a9.pdf
    • http://suzannefife.com/uploads/1/3/0/4/130477018/mokelejokedo.pdf
    • http://fikugo.anzven.ru/uploads/2020/01/27/f79e402488cdb.pdf
    • http://betterwithcontxt.com/uploads/1/3/0/6/130639664/1668706.pdf
    • http://mufflerdelete.com/uploads/1/3/0/6/130604558/zekesid.pdf
    • http://tifusoze.washcomes.com/uploads/2020/01/28/nuwomaxed_kuwibiteta_bovowofidelawu.pdf
    • http://onewesterra.com/uploads/1/3/0/5/130589442/f59804.pdf
    • http://bardswine.com/uploads/1/3/0/3/130379389/pobujisumigowimafig.pdf
    • http://tepa.luciemauger.com/uploads/2020/01/27/minapufirovorinizipe.pdf
    • http://us.momotombochocolatefactory.com/uploads/1/3/0/4/130436521/130436521.html#awdhesh+premi+ke+gana+dj++video
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012b6.bin
eaaa83d12302816377fdc53df462dc13d92167e406d02436e309079931e58590		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6 7812 bytes
font_01_sfnt_off00004628.bin
3acceacadc5abc00ce5a19012af40387241a2f3372d3a70f7454c8122b1c5792		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4628 8268 bytes

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