Malicious PDF — malware analysis report

Static analysis result for SHA-256 5657fb97f53d91f4…

MALICIOUS

PDF

48.1 KB Authoring application: pstoedit
MD5: a2ae043e4c877d2ff979d76fe5326c9f SHA-1: 7b24a8064c89a26e6f5a2e4f05cef386b2449d02 SHA-256: 5657fb97f53d91f4cdc15072401f0a9b62d78bf8a5cad3e7901c6909319f9c92
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm, often used for SEO poisoning or to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature. The document body content appears to be corrupted or truncated, providing no additional context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://anderson-missions.com/uploads/1/3/0/7/130775784/muminopofezuja-bokes.pdf
    • http://mybackyardbuilder.com/uploads/1/3/0/3/130313148/680775.pdf
    • http://assistancedogassociation.org/uploads/1/3/0/2/130289702/3526816.pdf
    • http://www.outlawyarns.com/uploads/1/3/0/3/130323253/157ad3d504e.pdf
    • http://rktttherapy.com/uploads/1/3/0/6/130605339/jubixira.pdf
    • http://starvegutfarm.com/uploads/1/3/0/3/130313038/84f907c.pdf
    • http://ryan-foster.com/uploads/1/3/0/6/130621201/7fdaf0a6e83.pdf
    • http://nevermoreacrespetrescueinc.com/uploads/1/3/0/5/130588550/6167560.pdf
    • http://agapa.net/uploads/1/3/0/6/130639326/putunafujon-buwatiduzafi-jutoz.pdf
    • http://gregwcraft.com/uploads/1/3/0/7/130775969/da1fd0d67d77.pdf
    • http://benjaminsmithmusic.net/uploads/1/3/0/8/130814673/mepez_livijaduvev_vitadogotudag_wiladagopo.pdf
    • http://learnized.com/uploads/1/3/0/6/130640107/tinunasavik-xawut.pdf
    • http://webdisk.brillomedia.com/uploads/1/3/0/3/130323597/vobutixaduki.pdf
    • http://babaanddada.com/uploads/1/3/0/7/130775808/78d7cc13.pdf
    • http://capellandecampo.com/uploads/1/3/0/2/130274032/4629910.pdf
    • http://mrsmorones.com/uploads/1/3/0/6/130620803/1083149.pdf
    • http://wenji.bpmtc.com/uploads/1/3/0/8/130815080/130815080.html#samsung+a50+manual+pdf+espa%C3%B1ol

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003148.bin
75b2ca24d697ec5f4b6f31661874e997e3afaa9402cdbb1efb827c7cf5a3fb4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3148 2532 bytes
font_01_sfnt_off00003bde.bin
73a1984f127b78f6868f142f056627410d70afac515264b95ee4cf81bb388972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BDE 4984 bytes
font_02_sfnt_off00004b30.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B30 2616 bytes
font_03_sfnt_off00005847.bin
deafef9c8a7c942deee7ab953899f9e1b3b62b8984b88cf3fcdafa03dead3185		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5847 12192 bytes

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