Malicious PDF — malware analysis report

Static analysis result for SHA-256 113796f1b11059f4…

MALICIOUS

PDF

44.0 KB Authoring application: QPDF
MD5: f79162c2be7a692f4a08e22765958734 SHA-1: a395ea760a766438897d1e20568c35b1c4870a00 SHA-256: 113796f1b11059f4bb827d41059e9c8e6d541280d5ddaa6d0d42cbc761bea21e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to PDF files, indicating a link farm for SEO or malicious redirection. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly suggest malicious intent. The presence of embedded URLs and a 'download' call-to-action further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://russian-travels.com/uploads/2020/01/28/dc2c840.pdf
    • http://providence-title.com/uploads/1/3/0/4/130476587/dovapi-kuxesa.pdf
    • http://adogsworld.be/uploads/1/3/0/7/130738794/fonemefepinoso.pdf
    • http://dij.herheddoha.pro/uploads/2020/01/28/7542884.pdf
    • http://anotsoemptynest.com/uploads/1/3/0/2/130288468/4428575.pdf
    • http://tommycookdrums.com/uploads/1/3/0/7/130775455/pepapawo.pdf
    • http://nupelicanparty.org/uploads/1/3/0/4/130478203/130478203.html#solomon+biology+10th+edition+pdf+free+download

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001129.bin
fe1c14a2a787bff32215e560215ea3a7d529081cd8192fbd6e6933b69ea3503a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1129 8440 bytes

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