Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14beccea4c64f6d…

MALICIOUS

PDF

33.9 KB Authoring application: Mobipocket Creator
MD5: 17d87bfc1c0332d9d2843ed63fa8770e SHA-1: fe2819f51c39ae656c5f2610917c13d9d5a0ab7e SHA-256: e14beccea4c64f6dda4bfba72e78dabbec826727e566992fdf84488e02c6f99f
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior. The document body, while containing some garbled text, mentions 'Baxi boiler service manual', suggesting a lure to entice users to click on the embedded links. The ML classifier and ClamAV detection further support the malicious nature of the file, flagging it as phishing or a trojan downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://momhustleology.com/uploads/1/3/0/5/130590339/b03f2.pdf
    • http://artfulbeingfineart.com/uploads/1/3/0/7/130739781/5491547.pdf
    • http://jamesagibson.com/uploads/1/3/0/7/130739294/gisujul.pdf
    • http://sauerlandhypotheek.nl/uploads/1/3/0/4/130435524/130435524.html#baxi+boiler+service+manual

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000f33.bin
f463459ad02e8b6cd009821c345aa580e8a4056e2c5b49c69b96ed43a300d610		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF33 7592 bytes
font_01_sfnt_off00003db0.bin
6db2f878e0fd57d3a351d0d81a5ccd7b58f68df6728dadc3aee3ebeb1a1d6e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3DB0 16068 bytes

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