Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e53cf091200318c…

MALICIOUS

PDF

41.3 KB Authoring application: OpenOffice Draw
MD5: 0be132669200b6abb9b7442fb6c9626f SHA-1: a038529428f220db177aa6419f975daab9d57bf6 SHA-256: 5e53cf091200318cf8dff9f85802fff8e19289613cbe4a096cc6f550e49af331
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links to other PDF files hosted on numerous domains, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. While no scripts were directly extracted, the embedded URLs are the primary indicators of compromise.

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://matchnrhyme.net/uploads/1/3/0/5/130544754/7548107.pdf
    • http://braedanritter.com/uploads/1/3/0/2/130291769/lajawadev.pdf
    • http://meter-key.com/uploads/1/3/0/5/130544072/2563595.pdf
    • http://supremespeech.com/uploads/1/3/0/6/130639699/f0145b5cfa4.pdf
    • http://pinellasperipheralneuropathy.com/uploads/1/3/0/3/130323526/b39384.pdf
    • http://newlifestylesnepelenaferraretto.com/uploads/1/3/0/2/130287299/9936953.pdf
    • http://qiessence.net/uploads/1/3/0/5/130551832/kowibowuva.pdf
    • http://juliaberry.org/uploads/1/3/0/4/130494871/lunodadenofiwo-xaganomo-lesuvog-sunepuxotow.pdf
    • http://tugo.jitoli.icu/uploads/2020/01/28/kalowezave_demisonudaz_mowiguxe.pdf
    • http://next2younext2me.net/uploads/1/3/0/5/130552084/sududeresarejiwig.pdf
    • http://theyretheretheir.com/uploads/1/3/0/2/130287221/609341.pdf
    • http://nationalriskmanagementgroup.com/uploads/1/3/0/5/130545043/130545043.html#relative+pronouns+defining+and+non-defining+exercises+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000130f.bin
14626d78d652aa781f724a107503c9f7b2fbee681e7c995c572a6b670f7becd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130F 8132 bytes

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