Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c3d70aecb235c86…

MALICIOUS

PDF

37.8 KB Authoring application: Soda PDF
MD5: b14aaf0951736708537de017b1ec5837 SHA-1: 4221216740fd5596ba54bbce37ecb09939e21d91 SHA-256: 8c3d70aecb235c86aad7284ccab31c877d1110dee385bcfe5c14fe16eca9f92c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, forming a link farm. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The primary heuristic 'PDF_SEO_LINK_FARM' confirms the presence of numerous external links, suggesting a redirection or phishing scheme. The document body contains seemingly unrelated medical text, likely a lure.

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 https://jososozibetok.weebly.com/uploads/1/3/0/5/130539756/mukawejevurakekoro.pdf
    • http://million-minds.org/uploads/1/3/0/5/130589366/6848f562.pdf
    • https://lakagagapida.weebly.com/uploads/1/3/0/2/130291689/3963533.pdf
    • http://ibnvinhonovo.net/uploads/2020/01/28/suzisaluwakesuk.pdf
    • http://mugovov.solomonka.online/uploads/2020/01/27/dotaput.pdf
    • https://litepowi.weebly.com/uploads/1/3/0/3/130379575/bixuveb-ramile-denimep.pdf
    • http://ndchair.com/uploads/1/3/0/5/130588597/130588597.html#polycythemia+vera+treatment+hydroxyurea

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000113b.bin
889af81e6e3b65f69c89f6b830e97dc9c919b12eecd1846984aec091063e69d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113B 8956 bytes

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