Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0e6c25829c7ce7…

MALICIOUS

PDF

35.7 KB Authoring application: OpenOffice.org
MD5: ba31caad19a19095b55c689014504620 SHA-1: 3593750c0e8aab677e6b15e47027fac79647cbe3 SHA-256: 7e0e6c25829c7ce7f4258f52d97cfa084a728f8cb9a4d0a84f40a5b10998fdec
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The primary indicator is the presence of a large number of embedded external links to other PDF files, suggesting a link farm or phishing campaign. The document body contains text related to 'solving absolute value inequalities', which appears to be a lure to disguise the malicious intent.

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://prosisw.com/uploads/1/3/0/4/130476525/kirafabora.pdf
    • http://ninety-percent.com/uploads/1/3/0/6/130639121/8933655.pdf
    • http://bcsgrubbox.com/uploads/1/3/0/6/130639528/4cc12.pdf
    • http://mygreatideas.co.nz/uploads/1/3/0/6/130604125/b5f05.pdf
    • http://mimundo.pl/uploads/1/3/0/5/130545098/1498834.pdf
    • http://thumbderstruck.com/uploads/1/3/0/7/130740053/musogukelevesibuzada.pdf
    • http://windsorwesley.com/uploads/1/3/0/7/130776272/9bca0e.pdf
    • http://nohokaiproductions.com/uploads/1/3/0/5/130588943/5212455.pdf
    • http://stanleycovington.com/uploads/1/3/0/8/130814226/130814226.html#lesson+2.3+solving+absolute+value+inequalities+practice+and+problem+solving+c

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001196.bin
d925557b8e2b3a8b8dcdf077b570a60a2395f2bd244f1430d89f955df2952d95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1196 7752 bytes

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