Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad9ad4e617717798…

MALICIOUS

PDF

37.2 KB Authoring application: LibreOffice
MD5: 9a155731505fe79a8945b495ff19ff1b SHA-1: 4ecacc88797fad64dcd746b294bcc386795127c2 SHA-256: ad9ad4e617717798abef9b45e9b9bec50454471c4b48c5af1f75c5dca4d43bd3
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to direct users to external PDF files hosted on various domains, including 'carollemonrealtors.com'. The document body, while containing some obfuscated text, mentions 'Hard reset ipod nano without itunes' as a lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and ClamAV identifies it as a dropper. The primary intent appears to be to redirect users to malicious content via these links.

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.Dropper.Agent-7788160-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7788160-0
  • 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://carollemonrealtors.com/uploads/1/3/0/5/130551063/4289f2.pdf
    • http://sukudona.strongysha.xyz/uploads/2020/01/28/6816991.pdf
    • http://thecottonlickers.com/uploads/1/3/0/5/130590140/9837113.pdf
    • http://massiv-stairs.ru/uploads/2020/01/28/931631.pdf
    • http://mrworkman.ca/uploads/1/3/0/3/130313066/a0f03.pdf
    • http://shenyuanfan.com/uploads/1/3/0/4/130476101/magitelemuwozo-bonurexi-kuxesopuro.pdf
    • http://doitallpressionals.com/uploads/1/3/0/4/130476069/130476069.html#hard+reset+ipod+nano+without+itunes

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010d9.bin
a33c4b5539d01f8766b73714e6ee05123f5848917a78eb11c070222db70ae69c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9 8212 bytes

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