Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5186cbdea800ea9…

MALICIOUS

PDF

35.8 KB Authoring application: pdf-parser
MD5: 8a927be0b06d2895f120b799d99576d3 SHA-1: 3a457626e3ed438eaabf2f0b6c8ad0da0f463262 SHA-256: a5186cbdea800ea9cda50ae93542565802173b884a17c9ef5abfafe553a96495
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, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection of 'Pdf.Phishing.TtraffRobotInstall-7605656-0' strongly suggests a phishing or traffic redirection campaign. The embedded URLs point to various domains, all likely part of this malicious infrastructure. No scripts were extracted from this sample.

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://citizensfirstfinancialgroup.com/uploads/1/3/0/5/130589346/3b3b88fd.pdf
    • http://ndjapanese.com/uploads/1/3/0/6/130621771/bifilulagotuvoxe.pdf
    • http://dprservices513.com/uploads/1/3/0/3/130379635/vixiwovenabuj-gisites-faropijakesax-gitusivesixib.pdf
    • http://ssixenterprises.com/uploads/1/3/0/8/130874567/xudoxelumide-noxufive.pdf
    • http://tunedinteacher.com/uploads/1/3/0/5/130588527/3028510.pdf
    • http://thehangaruk.co.uk/uploads/1/3/0/5/130543006/vuluxamuj.pdf
    • http://grantdigitalmedia.com/uploads/1/3/0/6/130621451/bf3e3dc.pdf
    • http://domaindrivenmicroservices.com/uploads/1/3/0/5/130539048/29ec16132.pdf
    • http://renmach.com/uploads/1/3/0/2/130289236/xotolobezoxej.pdf
    • http://stealthlaptops.com/uploads/1/3/0/6/130621771/tujezonotasit.pdf
    • http://rochecenter.org/uploads/1/3/0/3/130379597/130379597.html#hemiacetal+linkage+definition+and+examples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002824.bin
19f8080d307f524ab7174330f6406ed554944f799922afd2afaf0cac77e5bbdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2824 3388 bytes
font_01_sfnt_off00003614.bin
c12dfc9d8beb8338bef157bad3187fb576eb245f6a162d75def638aa57c35af9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3614 7552 bytes

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