Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0b4b44e038b015…

MALICIOUS

PDF

43.7 KB Authoring application: SWFTools
MD5: 9528e508503971539aec77e24b94f59c SHA-1: e43e77dee5a81417208055b6d158bd0af6a0ef0a SHA-256: 7f0b4b44e038b01534c593fc88b0bd53cee033cbdf715ac833957b8fbbaaf08f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to external PDF documents, a technique commonly used for SEO poisoning or phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent. The document body contains text related to 'Acknowledgement letter sample tagalog' which serves as a lure.

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://saveswenson.com/uploads/2020/01/27/80b998.pdf
    • http://tizuwabome.psgessoibbaatend.site/uploads/2020/01/28/5719912.pdf
    • http://mobileonegaming.com/uploads/1/3/0/6/130604581/a1d77c78eb644.pdf
    • http://wubikamama.videolur.pro/uploads/2020/01/29/rumavedidelufuv.pdf
    • http://feldenkraisontour.com/uploads/1/3/0/6/130621511/lefefenil_kogejifa_xatepikogewuze_labunexixowu.pdf
    • http://maxoteb.ceodentvicalvaro.com/uploads/2020/01/27/a6c82e3195.pdf
    • http://drjamesworling.org/uploads/1/3/0/6/130604413/5538421.pdf
    • http://the-birth-project.com/uploads/1/3/0/2/130289458/wikitujevoj.pdf
    • http://nationalriskmanagementgroup.com/uploads/1/3/0/2/130289580/130289580.html#acknowledgement+letter+sample+tagalog

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011fe.bin
a44cd14a7ea357c2a21ea409fbcfbcd83c901a9dccbc5855bb0d170215c08503		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE 8244 bytes

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