Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1150b08e52562e3…

MALICIOUS

PDF

39.8 KB Authoring application: LibreOffice
MD5: 37e437d9f65ee7f1a6ae3405e30a3a2b SHA-1: 30d8248c881cd8753f8e5aa10f376307b1868a80 SHA-256: d1150b08e52562e359fef25710eb11c6125d7728af59d61b646a5ea2b5088adb
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flag this as malicious. The embedded URLs point to various domains, suggesting a link farm or phishing campaign designed to direct users to potentially malicious content. 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://wordpress-market.ru/uploads/2020/01/28/visurisabuzapakanu.pdf
    • http://giki.forten.pw/uploads/2020/01/28/bafbc29e34153.pdf
    • http://notalright.org/uploads/1/3/0/6/130604907/piwitabuvawuwigomexu.pdf
    • http://pitup.gorlobolit.ru/uploads/2020/01/28/xotuk.pdf
    • http://mountbarkerstrathcatholic.com/uploads/1/3/0/5/130541077/9692789.pdf
    • http://kindledemocracy.com/uploads/1/3/0/6/130604804/sirojilisuwukoxugij.pdf
    • https://tedopilutixezi.weebly.com/uploads/1/3/0/2/130288301/30efa3c713ab.pdf
    • http://amourwed.tw/uploads/1/3/0/3/130323764/1d1340fa1a5.pdf
    • http://hello-baby-toys.com/uploads/1/3/0/5/130544437/130544437.html#cpcb+guidelines+for+hazardous+waste+analysis

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011c1.bin
1f98e302fdf85c59a053bf8e34f92ed8402a608a371b43592bf9aea0315c053b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1 7916 bytes

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