Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f8d599034e547e…

MALICIOUS

PDF

30.3 KB Authoring application: LibreOffice Draw
MD5: 81d63b5353bf820ccde28d61b22351b7 SHA-1: f2b5b99fcc5484661afcc2ed5f5445cce035de04 SHA-256: 85f8d599034e547e98dbbf6f35fa78aed446544b6580ed4175c65904ad42b5d8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded URLs, forming a link farm. The heuristic PDF_SEO_LINK_FARM indicates these links are designed to lure users to download further malicious content, specifically identified as a phishing attempt by ClamAV. The document body, though partially corrupted, contains text related to school calendars, suggesting a social engineering pretext to disguise the malicious intent.

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://polato.net/uploads/1/3/0/4/130483879/rutizemetop.pdf
    • http://zoux.com/uploads/1/3/0/6/130603834/8559123.pdf
    • http://zofova.tseh.su/uploads/2020/01/28/5a010656efb.pdf
    • http://organic-marijuana.net/uploads/1/3/0/6/130639669/wisutivu-kesetivogowades-tivanuzanufeju.pdf
    • http://yandex-afisha24.ru/uploads/1/3/0/6/130639417/wewomazurip.pdf
    • http://yeahviva.net/uploads/1/3/0/6/130639949/03eb43f4b.pdf
    • http://christine-carney.com/uploads/1/3/0/5/130588511/e4f1e738.pdf
    • http://betterbodiesgympattaya.com/uploads/1/3/0/5/130588395/nekixamujopat.pdf
    • http://narellecridland.com/uploads/1/3/0/6/130639454/9443195.pdf
    • http://seizediem.com/uploads/1/3/0/6/130620574/130620574.html#orange+county+va+school+calendar+2018-19

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011c4.bin
5576e1768db8cb9f10874411cc22e5734ff9def216fcf32c019d038e30c13e7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4 7476 bytes

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