Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeec5faa8553610d…

MALICIOUS

PDF

39.7 KB Authoring application: Solid Converter PDF
MD5: b3edd5584fc113199153a6ec5ffa3ef4 SHA-1: 6aba23f0df95a5e87e63a0c16c9e5e9a8ca40297 SHA-256: aeec5faa8553610dfcf4c0fdccbe7ca45da4f46d46593094ff6ae64d76792639
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute malware. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The heuristic 'PDF_SEO_LINK_FARM' confirms the presence of a mass external link farm, with the dominant host being mypersonalalchemist.com. No scripts were extracted from this sample.

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 http://mypersonalalchemist.com/uploads/1/3/0/4/130436271/menogigojetolebidima.pdf
    • http://kellenkellenkellen.com/uploads/1/3/0/7/130740265/namup.pdf
    • http://adaptingbrains.com/uploads/1/3/0/2/130288406/tolojav_sigukedelokil.pdf
    • http://sonjasewingcreations.com/uploads/1/3/0/5/130588591/zisubab.pdf
    • http://beezneezsausages.com/uploads/1/3/0/5/130590535/aa19ac9abcc.pdf
    • http://my-bwk.com/uploads/1/3/0/2/130270957/pepesopelipemi-pobafumowuwivu-zivebapezofelo.pdf
    • http://anitaleverarttherapist.com/uploads/1/3/0/7/130740443/wunitop-poridu.pdf
    • http://mynaturalhairspa.com/uploads/1/3/0/5/130551004/130551004.html#internship+cover+letter+accounting

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011b7.bin
82d6a6fdbd68a4e4d392d34808de9ce63f394b09a0a774a4b31e42770bd062a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7 8708 bytes

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