Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89a1f79c677ade9…

MALICIOUS

PDF

36.3 KB Authoring application: OpenOffice.org
MD5: 8beff31172877a7c24de2c278cb1d797 SHA-1: 2b2343c270b1b8299fce9a0b428e8630250d4c7b SHA-256: c89a1f79c677ade9341388341df9d6874704ed0bf85af9ee2fed1cace1eede16
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, which is indicative of a phishing or malware distribution campaign. The ClamAV detection further supports its malicious nature. The embedded URLs are likely used to redirect users to malicious content or download further malware.

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://keguz.ecorutas2x2.com/uploads/2020/01/28/3ce2b1.pdf
    • http://calvarydifference.com/uploads/1/3/0/3/130379814/b7cd29.pdf
    • http://beanstockbrand.com/uploads/1/3/0/4/130483660/a7c55fd.pdf
    • http://nzps2019.nz/uploads/1/3/0/2/130289346/keroxevigev.pdf
    • http://nateas.ru/uploads/2020/01/28/vadezuwerevozi-gelogujazidi-seriruzemozi-gasulekozelug.pdf
    • http://arlingtoneaglesvb.weebly.com/uploads/1/3/0/4/130483741/bonividefidosijig.pdf
    • http://ashishyadav.com/uploads/1/3/0/5/130590380/130590380.html#android+store+data+in+application+object

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001159.bin
00658ca7bbcbf8eeba7c0c33cde7831466de62a54e773a00e46e4affa7c17720		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1159 8764 bytes

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