Malicious PDF — malware analysis report

Static analysis result for SHA-256 d050f24588c7a161…

MALICIOUS

PDF

70.4 KB Authoring application: PDFBox
MD5: 11517bccc85539d9bc956ab8d65cd5a6 SHA-1: 2c30d7a1ad30d8a0cedf1d0ef5372745f474f954 SHA-256: d050f24588c7a1617332a36b630d760dca7831f099b54c89ced3a0a9d50da4a3
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This pattern is commonly used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly support the malicious nature of this file. No scripts were extracted from this sample.

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://www.lipsticklovelies.com/uploads/1/3/0/7/130740110/donolotuvoligab.pdf
    • http://quorumpro.com/uploads/1/3/0/6/130604636/pivofuzajof-zebosegilupi-fibikamegozev-gometip.pdf
    • http://mystoretrackr.com/uploads/1/3/0/7/130776444/409130.pdf
    • http://update8020.com/uploads/1/3/0/5/130589366/sitimugaz_xisalot_saxazokewar.pdf
    • http://austinbrunkhorsthomes.com/uploads/1/3/0/5/130540472/lezak_mijativekuxu.pdf
    • http://mspuppies.com/uploads/1/3/0/6/130639949/safugew_medepuzelewugop_fegezikijovabo_tawafuj.pdf
    • http://deadweightmovie.com/uploads/1/3/0/6/130639535/bazutulaxokevi_dowoxe_fejof_fudewo.pdf
    • http://www.homeschoolsocial.org/uploads/1/3/0/6/130620367/kunizadetuvubig.pdf
    • http://emilyyy.com/uploads/1/3/0/8/130814967/nodos-tosijoji-rugajuzakoju-nisodoguviwa.pdf
    • http://teachingjobsinohio.com/uploads/1/3/0/4/130476492/kibuvisin_tukakabimep_venazovegozad_livowu.pdf
    • http://veteransmusicfest.com/uploads/1/3/0/4/130483140/07e36b.pdf
    • http://webdisk.fredcarmichaelsafety.com/uploads/1/3/0/6/130605075/gixukez_pilurolik_nalakiluratomu.pdf
    • http://kristylewis.fish/uploads/1/3/0/5/130543545/4157cec70b602.pdf
    • http://idealmedikal.com/uploads/1/3/0/2/130289179/5445558.pdf
    • http://sgmtrack.com/uploads/1/3/0/7/130739618/130739618.html#vasogenic+edema+radiology+differential

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000220a.bin
80e45367e651fbcccfc0fd5fe0ce8ece6e99badd49d47d63f43e7c4af7e780af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x220A 7620 bytes
font_01_sfnt_off0000d9dd.bin
6dc6e07f93ae70488a19e8a398a1c6cda2f5723fc3d3cbe180c5afbb10c3611e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DD 2864 bytes

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