Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7280b4403157e1…

MALICIOUS

PDF

58.8 KB Authoring application: Pdftk
MD5: af34ee6620f1e884fbad800953d39931 SHA-1: 5be0f5966133e07a3e3d353944285af770595960 SHA-256: bf7280b4403157e1f1cd38074667589a75c88e807b96f6945df6cbb30d0d89bb
150 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and a machine learning classifier. The primary attack vector appears to be a link farm, with numerous embedded URLs pointing to external PDF files. This technique is commonly used to distribute phishing content or redirect users to sites hosting malware. No scripts were extracted from this sample, and the document body contained mostly obfuscated or irrelevant text.

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://beyondbeliefthebook.com/uploads/1/3/0/5/130545753/57087b0ecd8.pdf
    • http://loftzone.net/uploads/1/3/0/5/130539458/cdd89de098.pdf
    • http://www.lesmisauckland.co.nz/uploads/1/3/0/6/130621645/61c652509.pdf
    • http://kirillian.net/uploads/1/3/0/6/130621938/9006311.pdf
    • http://www.alexmeers.com/uploads/1/3/0/6/130639357/2005480.pdf
    • http://oliviawinter.net/uploads/1/3/0/6/130605119/2597610.pdf
    • http://mail.creatingsarah.com/uploads/1/3/0/4/130488543/1879879.pdf
    • http://wenyingzhizunyulechengwanbaijiale.f18.ebkf.org/uploads/1/3/0/2/130288002/6653758.pdf
    • http://shogiforum.net/uploads/1/3/0/3/130313299/ae94b021cde89.pdf
    • http://nesyb.net/uploads/1/3/0/2/130272649/muwuvep-banetamutuzusiw-pufupetokuvoma-sumirov.pdf
    • http://bushnelltents.com/uploads/1/3/0/6/130621261/1490719.pdf
    • http://kumukaliportfolio.com/uploads/1/3/0/7/130776781/fdb4aaebad2.pdf
    • http://trainingcenterchurch.org/uploads/1/3/0/5/130551687/91e6cc9.pdf
    • http://lidiabrito.com/uploads/1/3/0/7/130775092/9118314.pdf
    • http://www.buildtherelationship.com/uploads/1/3/0/2/130270907/towiwelenewogur.pdf
    • http://ausprodetail.com/uploads/1/3/0/2/130288939/5195525.pdf
    • http://lovelyinkbrowdesign.com/uploads/1/3/0/6/130620936/d71761be0c8a069.pdf
    • http://babyfreebies2020.com/uploads/1/3/0/5/130588654/vumobujefef.pdf
    • http://piropeandopueblo.com/uploads/1/3/0/7/130775278/c6d85a85.pdf
    • http://gjh40.slpny.com/uploads/1/3/0/6/130604610/130604610.html#anticholinergic+cause+glaucoma

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011ec.bin
48a2ad8538c571bfba2f3abdc2db8182b4f83c5dcc3dfa26840fc5aecfd7bbee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC 8328 bytes
font_01_sfnt_off0000969b.bin
61ca593122bdf9f8d2de89784c713a2b278bdd5b054eff5a59c50fd3ef05b3a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x969B 16148 bytes

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