Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c0c51032b54fa0…

MALICIOUS

PDF

40.5 KB Authoring application: LibreOffice Draw
MD5: bcca1c0d3f226369852e41268d14d3d6 SHA-1: be96ed0f0dfe65f505feaa1e5c9bc617aef89413 SHA-256: b8c0c51032b54fa061af868585a73f42bd029094318c12d31fdec306d3381a8d
150 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a machine learning classifier with high confidence. The heuristic PDF_SEO_LINK_FARM indicates the presence of a large number of external PDF links, with the primary suspicious URL being http://dajukex.trytowin.fun/uploads/2020/01/28/gekilixom.pdf. This suggests the document is designed to lure users to malicious sites.

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://dajukex.trytowin.fun/uploads/2020/01/28/gekilixom.pdf
    • https://ruzitamiku.weebly.com/uploads/1/3/0/5/130588749/dusopunamuduvena.pdf
    • http://nagur.restaurantevalledeltietar.com/uploads/2020/01/28/2e0c714e.pdf
    • http://kresadmissions.com/uploads/1/3/0/6/130622083/melelexiroguje_julorabidale_debufuruj_duzipise.pdf
    • https://merogakusaga.weebly.com/uploads/1/3/0/2/130291676/4870959.pdf
    • http://tizuwabome.psgessoibbaatend.site/uploads/2020/01/28/balituvoluna-werabaturup.pdf
    • http://rswanson.net/uploads/1/3/0/6/130605292/5923749.pdf
    • http://gifid.kropanev.online/uploads/2020/01/27/2574381b81e593.pdf
    • http://saw.finni.ru/uploads/2020/01/29/vadesoso.pdf
    • https://kepovebakeko.weebly.com/uploads/1/3/0/5/130550760/f4cb9c9.pdf
    • http://meganssoap.com/uploads/1/3/0/2/130271076/9cb77d.pdf
    • http://theleawoodfamilydentist.com/uploads/1/3/0/4/130488332/130488332.html#butterfly+wings+coloring+sheets

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012c4.bin
cb450d9ce01339f59312330d7ce133d0f96a3a940710b3241073995f836358aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4 8084 bytes

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