Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dfc74e263433324…

MALICIOUS

PDF

75.2 KB Authoring application: OpenOffice.org
MD5: 1fd8942ae0a2e7f87a9278d53a55f297 SHA-1: 64c32c5d24dd64c518d1c9dfabd9ccfa9afdc929 SHA-256: 0dfc74e263433324af3021f776afd191f84012bd91e751c8a1f974378f5247b6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links to other PDF files, disguised as IELTS speaking test materials. This technique is commonly used for SEO poisoning or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://abogadospluralistas.org/uploads/1/3/0/5/130588461/dejavutokeram.pdf
    • http://rockvilleintegrativetherapist.com/uploads/1/3/0/3/130379581/8b5c32.pdf
    • http://skycruizair.com/uploads/1/3/0/4/130478602/286076.pdf
    • http://paradigmfactory.com/uploads/1/3/0/6/130621317/3345941.pdf
    • http://mykonosphotographer.com/uploads/1/3/0/7/130775822/807004.pdf
    • http://mynaturalhairspa.com/uploads/1/3/0/4/130489909/130489909.html#ielts+speaking+test+part+2+with+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000112f.bin
670d9c81e32aae82ce6137feb87279febd7cd3a6880381d4635735b80c877515		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112F 8496 bytes

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