Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a3deba54878577e…

MALICIOUS

PDF

34.9 KB Authoring application: Smallpdf Desktop
MD5: 9dfc24a284a7a4478554665a8f504c04 SHA-1: 3f1a50dfaad13941aae9191aaa5d8fb1c46348c1 SHA-256: 9a3deba54878577e298a85c01ac4f680b7e747f3f143513918c6deabecc2f63b
150 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique commonly used in SEO poisoning and phishing campaigns to direct users to malicious websites. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The embedded URLs are likely part of a link farm designed to distribute malware or lead to phishing pages.

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://iwonderwouldi.com/uploads/1/3/0/2/130272619/13cca42.pdf
    • http://millenniumobile.com/uploads/1/3/0/5/130588206/3733493.pdf
    • http://kerrydavies.net/uploads/1/3/0/5/130539403/4175719.pdf
    • http://chinamininggroup.com/uploads/1/3/0/5/130588962/numopow.pdf
    • http://studiomusicent.com/uploads/1/3/0/9/130969603/e318a.pdf
    • http://missgojo.com/uploads/1/3/0/3/130313624/tepojaga.pdf
    • http://www.mindbody-solutions.net/uploads/1/3/0/7/130740591/fawuvigaruwu.pdf
    • http://www.no-drift.com/uploads/1/3/0/4/130476410/8124369.pdf
    • http://wamits.com/uploads/1/3/0/5/130550711/7214285c9d.pdf
    • http://machinehousecaskales.com/uploads/1/3/0/7/130775056/pijezezisutapas.pdf
    • http://anvilmediagroup.com/uploads/1/3/0/2/130272387/debizugijulidifu.pdf
    • http://danieljameshughes.com/uploads/1/3/0/6/130639706/gubule-jabujusesute.pdf
    • http://www.agewellnutrition.com/uploads/1/3/0/2/130271211/5956247.pdf
    • http://jinyouqipaiyouxidating.br3h.com/uploads/1/3/0/5/130543878/130543878.html#o+que+%C3%A9+h%C3%A9rnia+hiatal+por+deslizamento+de+pequeno+volume

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002edb.bin
fdf83d9db0316911ffe24eb55c597fc3ef9c691c1cfb27d4a6dd031919098ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EDB 9696 bytes

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