Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49a509870e39cf2…

MALICIOUS

PDF

41.4 KB Authoring application: LibreOffice
MD5: 337d9aff97405529cd430eb09ba4b9e6 SHA-1: e8cb398ac2d4ad2b6e523e01360e243cb10133d8 SHA-256: d49a509870e39cf235d0ecdeb1a440923e9cef9fac18fde83c3730493b742ff9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, with the first being http://nickreese.net/uploads/1/3/0/5/130551788/bovuke.pdf. This suggests the document is designed to redirect users to a network of potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://nickreese.net/uploads/1/3/0/5/130551788/bovuke.pdf
    • http://www.northernneckmetals.com/uploads/1/3/0/7/130738706/445830e80067.pdf
    • http://teamelam.com/uploads/1/3/0/2/130271219/98426fcb56d78c.pdf
    • http://kotlinforums.com/uploads/1/3/0/5/130541597/4504294.pdf
    • http://lytness.com/uploads/1/3/0/6/130639741/1178485.pdf
    • http://abundantlivingerrandservices.com/uploads/1/3/0/4/130435638/dedipuzivubakos.pdf
    • http://tokeplusherbs.com/uploads/1/3/0/5/130589366/0a699c.pdf
    • http://thesweethi.com/uploads/1/3/0/5/130588437/1202981.pdf
    • http://simplygreenhomeservices.com/uploads/1/3/0/2/130270796/6275104.pdf
    • http://citytocountry.ca/uploads/1/3/0/6/130620556/6218029.pdf
    • http://agrupacioncaramelo.com/uploads/1/3/0/5/130550682/373c99348a5.pdf
    • http://themeforast.com/uploads/1/3/0/7/130775084/130775084.html#surah+e+rahman+urdu+translation

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bc7.bin
8e9534036b31bd10c03239ff7746e1732ce583eace85501e67e151d4949c10d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BC7 7872 bytes

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