Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f76830ff51753c5…

MALICIOUS

PDF

36.0 KB Authoring application: Inkscape
MD5: 6a0290c1680d8ce5cbff5c3da7eeea0f SHA-1: 1a220a002ae12e250f401de30745bd56a3fb1c09 SHA-256: 5f76830ff51753c5f49e2bd7cbdae94c08f3dfcb1fad3f4388a92550184b8c33
192 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDF files, suggesting a link farm designed to host malicious content. The embedded document body, though obfuscated, contains URLs that are likely part of this lure. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://dealingwithstuff.com/uploads/1/3/0/5/130547659/5b45ff37b723.pdf
    • https://kugodigub.weebly.com/uploads/1/3/0/3/130323281/fc4f7ca4a.pdf
    • http://annlasusa.com/uploads/1/3/0/2/130287266/8262650.pdf
    • http://chapmanfarrellgroup.com/uploads/1/3/0/3/130323998/9928459.pdf
    • http://westcoastpowerwashing.com/uploads/1/3/0/4/130488229/rezeb.pdf
    • http://desatascossantfeliudellobregat.com/uploads/1/3/0/6/130621045/54f91677219.pdf
    • http://motherofbrumbies.com/uploads/1/3/0/6/130620691/35fbf2d4.pdf
    • http://movementuniversity.com/uploads/1/3/0/2/130288326/1013056.pdf
    • http://watercolorcreativitylessons.com/uploads/1/3/0/6/130621324/3310540.pdf
    • http://vogepis.myagent.pro/uploads/2020/01/28/3138889.pdf
    • http://reboundat.com/uploads/1/3/0/4/130488698/130488698.html#vmware+workstation+pro+12.+1.+1

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001232.bin
625dae1ed77ae8a77be8d8bc2ef80332ac6b5b2af5b3eb08637f5d1a80fab557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1232 8496 bytes

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