Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba59c99fadf2e90…

MALICIOUS

PDF

34.2 KB Authoring application: LibreOffice
MD5: e3d7016f419f8da7d98914eefa06ae67 SHA-1: f5b527a61a9f604615ce30a69eb108e6bb729652 SHA-256: 0ba59c99fadf2e90d7c045cf212e69f45d3f69a22c5951c9246da5e7e6b17d2e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links to other PDF files, disguised with generic filenames and hosted on various domains, which is characteristic of a link farm used for SEO poisoning or distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. The embedded URLs suggest an attempt to redirect the user to further malicious sites.

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://orangeparktreeservice.com/uploads/1/3/0/5/130590282/99fb0b22d0d84.pdf
    • http://sadaxix.stoneprocessingtool.ru/uploads/2020/01/28/7736542.pdf
    • http://keopukonacoffee.com/uploads/1/3/0/6/130620469/ravenuzenugafuk.pdf
    • http://whatthehula.net/uploads/1/3/0/6/130620348/2459582.pdf
    • http://tanjoy.net/uploads/1/3/0/6/130639042/cfa10ec3c9ef67.pdf
    • http://edisonhs.weebly.com/uploads/1/3/0/6/130604945/zunosireki.pdf
    • http://towarchik.fun/uploads/2020/01/29/5486521.pdf
    • http://happycamperllc.com/uploads/1/3/0/2/130287881/7e992b1049b.pdf
    • http://shopconsidertheravens.com/uploads/1/3/0/6/130620899/4409389.pdf
    • http://nolumogo.imakerlab.club/uploads/2020/01/28/1722334.pdf
    • http://5pointauto.com/uploads/1/3/0/6/130605432/130605432.html#accident+report+805+san+diego

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001241.bin
5fa7a537be03f3d1813f5832ae343472d04bcdbbfd03edcb49c8d69ecf3d9fb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1241 8052 bytes

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