Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a58be57bc5a1ad4…

MALICIOUS

PDF

35.9 KB Authoring application: Serif PagePlus
MD5: 2c894da7812493328ea70dbd27ad85f4 SHA-1: 097ee90e54bfc4e6668afe111dd0f9cb356a0f08 SHA-256: 5a58be57bc5a1ad408184af802e761f0a10aa5cc37b4964d9b77f565ad64ad56
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external PDF link farm, with numerous URLs pointing to other PDF files, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly suggest malicious intent. The presence of a visual download button further supports a lure-based attack pattern.

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 https://varumedilekiz.weebly.com/uploads/1/3/0/5/130550898/jumaxawafid.pdf
    • http://flbenthos.org/uploads/1/3/0/2/130272086/612d2a.pdf
    • http://aimonpurpose.com/uploads/1/3/0/6/130621868/jovuruzovopuwamupa.pdf
    • http://gofomivaj.sibket.ru/uploads/2020/01/29/kovegon.pdf
    • http://jazufuxe.best-journal.ru/uploads/2020/01/28/f94af6ded0c.pdf
    • http://zajuvune.nayada-online.com/uploads/2020/01/27/bafakavikuxuj_fudowozu.pdf
    • http://goodn3wsgirl.com/uploads/1/3/0/5/130540699/6569738.pdf
    • http://mamascleaningservices.com/uploads/1/3/0/5/130590338/bukin_xawifizovu_widepepup_feras.pdf
    • http://moneytipmonday.com/uploads/1/3/0/5/130590412/130590412.html#adobe+premiere+elements+13.0

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013df.bin
118828d879a6a48387f6d5565af230cd5db2698b0fe23683fa55c85437fcbe5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF 9140 bytes

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