Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7581751bbd592ee…

MALICIOUS

PDF

40.0 KB Authoring application: PDFedit
MD5: 4e0f30d4750f76693dbdfb6da2b31b4f SHA-1: 4b67987999ad1873d944ee52fae64d8cae97d2c5 SHA-256: a7581751bbd592eeea944dff893598f36165fb9dda74358283254dfad075ab38
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm or redirection scheme, commonly used in phishing or malware distribution campaigns. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic redirection intent. No scripts were extracted, but the extensive link farm suggests the primary goal is to direct the user to malicious content hosted externally.

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://woodenbrightness.com/uploads/1/3/0/4/130488699/2d558bfed14.pdf
    • http://jenitacargo.com/uploads/1/3/0/2/130287289/gimirikebesesuwolov.pdf
    • http://dev.shamalstart.com/uploads/1/3/0/6/130621132/bileromab.pdf
    • http://newnoiseguitars.net/uploads/1/3/0/5/130543600/ad78ddb0ab6e30.pdf
    • http://discoverhomestores.com/uploads/1/3/0/6/130640081/lagepoje_tiwavarulon_verajig_bezujoli.pdf
    • http://questbusinesses.com/uploads/1/3/0/6/130620198/sokonizuderexin.pdf
    • http://mhrandlenovels.com/uploads/1/3/0/4/130488662/130488662.html#first+law+of+thermodynamics+is+also+called

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001139.bin
c6635b5155ea04b2842b9e9bbe2a34a7dae87376c01a2ce85b42ed4f9091242b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1139 8108 bytes

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