Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a3ece821f908ee…

MALICIOUS

PDF

34.3 KB Authoring application: Mobipocket Creator
MD5: 9cde66ce7ea3e52d59db02f5ca07a4bb SHA-1: c78e6bf68ece6b93f2142f5ecf85f364946b7abf SHA-256: f0a3ece821f908eea605e0bfbf96c6d799b71f433155dbd7e6a30fe375c6b189
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ClamAV as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and a critical PDF_SEO_LINK_FARM rule. The document contains a mass of external links to other PDF files, indicating a likely phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness.

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://robafumus.bslg.ru/uploads/2020/01/29/kufunepil-dovejosinaz.pdf
    • http://rpprincess.com/uploads/1/3/0/4/130483820/2573f.pdf
    • http://brookesaltus.com/uploads/1/3/0/2/130272880/8260907.pdf
    • http://alignpilatesfitness.com.au/uploads/1/3/0/6/130639566/rovanowukazepox.pdf
    • http://g-c-s.cc/uploads/2020/01/28/dizowaf.pdf
    • http://peggyjoyceruth.net/uploads/1/3/0/6/130604639/wovovigegegagub.pdf
    • http://antiviruseprotectserviceonline.site/uploads/1/3/0/6/130620435/130620435.html#autocad+civil+3d+2019+tutorial+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001271.bin
20a89ed5b436b92466dddd22ad129428a8396550e4366ca5136581bc0648e41b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1271 9184 bytes

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