Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b9c830b59c5aca…

MALICIOUS

PDF

51.4 KB Authoring application: Karbon First seen: 2020-09-04
MD5: da72164afc377b5f896eed96d6abc1a9 SHA-1: 0e235268e04e73a39dcf04acf53b63659d8a3cce SHA-256: 66b9c830b59c5aca243db034000de02205e60fca8a307264710e79ad649a4334
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, indicating a link farm or a distribution mechanism for further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the sheer volume of external links is highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://looe-festival-of-the-sea.com/uploads/1/3/0/6/130639105/pemodo.pdf In PDF document text
    • http://adrianbyrdcounseling.com/uploads/1/3/0/5/130540281/xopepobizolob.pdfIn PDF document text
    • http://thecynicalsage.com/uploads/1/3/0/8/130813332/ef1bfec27b.pdfIn PDF document text
    • http://buildajump.com/uploads/1/3/0/3/130313107/1bda0b4cb9.pdfIn PDF document text
    • http://dmrcvss.co.uk/uploads/1/3/0/2/130271047/megipomat.pdfIn PDF document text
    • http://leapfrogcamo.ca/uploads/1/3/0/3/130379824/ziwijabidad.pdfIn PDF document text
    • http://stevenyasell.com/uploads/1/3/0/4/130478057/jasazagiwasot.pdfIn PDF document text
    • http://intheom.com/uploads/1/3/0/2/130291800/gusetebasemoze.pdfIn PDF document text
    • http://www.threemightychickens.co/uploads/1/3/0/7/130776500/wegaxidipipotapu.pdfIn PDF document text
    • http://rulr.org/uploads/1/3/0/5/130540592/ffc915149a.pdfIn PDF document text
    • http://sms.shelbyvillebands.com/uploads/1/3/0/7/130775197/rixiju_movodura.pdfIn PDF document text
    • http://kierragambrell.com/uploads/1/3/0/3/130313370/5ee55.pdfIn PDF document text
    • http://avadhaniestate.net/uploads/1/3/0/7/130738657/2566079.pdfIn PDF document text
    • http://aaceglobal.com/uploads/1/3/0/7/130775772/pezufulamip.pdfIn PDF document text
    • http://jumanjee.com/uploads/1/3/0/4/130490776/wadixazijam.pdfIn PDF document text
    • http://theoilymixer.com/uploads/1/3/0/5/130550949/ca4cf3.pdfIn PDF document text
    • http://trainerblueprint.com/uploads/1/3/0/2/130287932/a1c4f1f.pdfIn PDF document text
    • http://babylon5cards.com/uploads/1/3/0/8/130813094/levatotesinexup.pdfIn PDF document text
    • http://southhillssoccer.org/uploads/1/3/0/5/130543848/130543848.html#hypergeometric+distribution+minimum+sample+sizeIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F43 16444 bytes
SHA-256: 5518c15a21c44b98c6916baddc9a1b991d76e2308ba51be03ca595f52d67c89b
font_01_sfnt_off000068b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B3 9228 bytes
SHA-256: f61952c5e5fae5f88ff198254484d24bda21574c82c030a787c07768592cde66