Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50d4d5a465a2448…

MALICIOUS

PDF

40.1 KB Authoring application: Serif PagePlus
MD5: b1e58b95f26a54617dd9fb3c406efc07 SHA-1: e2c95e61b724248829c626b271705c5ce0e71690 SHA-256: a50d4d5a465a24489624c851b440dc4fd6ecdb9455a46380287e8e24ecf2128c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The heuristic 'PDF_SEO_LINK_FARM' confirms the presence of a mass external PDF link farm, with 'sjnbasketball.org' being a dominant host.

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://sjnbasketball.org/uploads/1/3/0/4/130490078/1b78b6f96e18.pdf
    • http://toobusymomsbooks.com/uploads/1/3/0/5/130588672/winetumizesov_baxiwogu_nijepolanubo_jixeguliguf.pdf
    • http://iwamastyleatlanta.com/uploads/1/3/0/6/130605116/fuwunorixipapipate.pdf
    • http://buyerstreasure.com/uploads/1/3/0/5/130538992/vivovami-jalagox.pdf
    • http://mollyjoseph2.com/uploads/1/3/0/6/130620207/vavela_benafe_pisisojit_lonerezomimebik.pdf
    • http://jeremywagstaff.net/uploads/1/3/0/6/130639583/501077.pdf
    • http://mybarrieroflavish.com/uploads/1/3/0/5/130550857/0861f4c20af7.pdf
    • http://pawsitively-groovy.net/uploads/1/3/0/5/130589160/a9df11ba8de.pdf
    • http://sjnbasketball.org/uploads/1/3/0/5/130540049/kamamupax.pdf
    • http://berea-associates.com/uploads/1/3/0/7/130775958/6b080d88.pdf
    • http://mrstodd.net/uploads/1/3/0/2/130270941/kukurumeturaj.pdf
    • http://neokundalini.org/uploads/1/3/0/8/130813651/130813651.html#corrective+action+report+coles

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012ed.bin
cd1c82dea732508d18b88af55d38cb25882d45a4a81b87e8fd1fba08df7a0562		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED 8132 bytes

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