Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa6546002fdd6263…

MALICIOUS

PDF

39.9 KB Authoring application: pdf-parser
MD5: d7b43aba32f44de38b36c4cd3d7676fd SHA-1: 53112ccea192bab636a5649e217312824e46c326 SHA-256: aa6546002fdd626384f308de02c7571cb361882c2db32693c4f8ee688741a98c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, characteristic of a link farm designed to direct users to malicious sites. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support its malicious nature. The embedded URLs are likely part of a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://alternativerecoverysolutions.com/uploads/1/3/0/7/130739949/fijowal_wudezikutupod_kumagiwalaz.pdf
    • http://endoflifedoula.co/uploads/1/3/0/6/130605002/lomutobafufavavu.pdf
    • http://betterforlincoln.com/uploads/1/3/0/4/130436049/zorope_xiniva_misatelemunibez_kosafoji.pdf
    • http://nashvilledrones.com/uploads/1/3/0/2/130289427/vukifesiwonudavufoko.pdf
    • http://lcdigitalconnect.com/uploads/1/3/0/2/130288924/kitulo_fuxajirepiwusu_bivozazabif.pdf
    • http://zambiasafarihunting.com/uploads/1/3/0/6/130639990/130639990.html#thyristor+controlled+welding+rectifier

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001131.bin
c43448107630963f622bf48d2fae8dbc70afbfff43c864e6f869ad854410eb7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1131 8560 bytes

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