Malicious PDF — malware analysis report

Static analysis result for SHA-256 d51f5c170c79a122…

MALICIOUS

PDF

37.3 KB Authoring application: PDFBox
MD5: af4a777e33536f9a7fbd7ae22ed3fa97 SHA-1: f4c0b65649f4ed86190bf84c48a6b85854058621 SHA-256: d51f5c170c79a12227ea36b64eaa538afba736791942e5a61113b5ef3df04a51
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links pointing to external PDF files hosted on various domains. This technique is commonly used for SEO poisoning or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery through these linked documents.

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://authenticbeing.info/uploads/1/3/0/5/130588294/2c15ebc4.pdf
    • http://tinytotdressshop.com/uploads/1/3/0/6/130621483/zewarer.pdf
    • http://surge-design.com/uploads/1/3/0/3/130379803/diwafexedit.pdf
    • http://dashielllaw.com/uploads/1/3/0/4/130483565/zowefizimovekotunuxi.pdf
    • http://curvo.org/uploads/1/3/0/6/130639719/maluxobukatezivotir.pdf
    • http://www.srobersonart.com/uploads/1/3/0/7/130739474/pumoxanixag_givuretesodok.pdf
    • http://musigep.org/uploads/1/3/0/6/130604788/8386713.pdf
    • http://sopoochtraining.com/uploads/1/3/0/5/130590215/56b7de400646b0.pdf
    • http://hostmaster.toniklab.com/uploads/1/3/0/4/130476539/532defb9525a.pdf
    • http://timewilderness.com/uploads/1/3/0/9/130968913/9779671.pdf
    • http://oaklandcommunitycouncil.org/uploads/1/3/0/6/130639463/wuzezinagutuguv-junasovatuli.pdf
    • http://grandadsallottment.com/uploads/1/3/0/3/130379199/130379199.html#compare+and+contrast+qualitative+and+quantitative+research+methods

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003ad7.bin
c58d9245f53ea8750b8f3edafd7de023cab375d35e4a2c1313ff3d23dd0cea77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3AD7 7972 bytes

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