Malicious PDF — malware analysis report

Static analysis result for SHA-256 701b4aaf005f8008…

MALICIOUS

PDF

37.4 KB Authoring application: pstoedit
MD5: b6f7974c8a73032fa7707e00bee4a8db SHA-1: 65b834a8e7427cc21a57477c4eb96194b05a0341 SHA-256: 701b4aaf005f800813d4790b01201f672738bf69497282de63e4060a42815905
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links to external websites, many of which appear to be part of a link farm designed to obscure malicious destinations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the presence of numerous suspicious URLs points to a web-based attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://petervinthagen.com/uploads/1/3/0/6/130639220/duzuvurevufar.pdf
    • https://vubibodufujur.weebly.com/uploads/1/3/0/4/130436140/mowulo.pdf
    • http://danielrinaldi.com/uploads/1/3/0/2/130288421/f50a71d.pdf
    • http://phillywaxing.com/uploads/1/3/0/3/130323596/lugewolif_muxiwabe.pdf
    • http://nikkimichelleandthecosmiccollectivemusic.com/uploads/1/3/0/4/130490399/vimit.pdf
    • http://ndtasanantonio.org/uploads/1/3/0/6/130620949/130620949.html#blackberry+leap+android+version
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010c1.bin
a43695dc0568ec7b01b272c98cbc7ccf48df74697d464affe955365b4642a321
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1 8912 bytes
font_01_sfnt_off000050e2.bin
d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04
pdf-font-stream PDF embedded font (sfnt) at offset 0x50E2 2616 bytes
font_02_sfnt_off00005949.bin
c5dce58c2b8319cc0ea0471042f56ccc578a7965d5e953afe2a4c3989f045e6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5949 1184 bytes