Malicious PDF — malware analysis report

Static analysis result for SHA-256 836a3ed0ef26c3dd…

MALICIOUS

PDF

36.6 KB Authoring application: Nitro PDF
MD5: 98971b5c4b672c192e6d048359083c60 SHA-1: 357aa2a01e1566e66757caa660aa43667ca94317 SHA-256: 836a3ed0ef26c3dd22aa4cce9e74ac70ca6c0c1c9ab21a812c88af0e0d138655
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links to other PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score indicate malicious intent. The embedded URLs likely serve as a distribution mechanism for further malicious payloads.

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://montgomerytattoos.com/uploads/1/3/0/6/130605254/7317556.pdf
    • http://richardsnashall.net/uploads/1/3/0/3/130312920/poxuwimozapode_mipumoj_jafiwuv_tutogubezo.pdf
    • http://mrkdenton.com/uploads/1/3/0/4/130483886/4258249.pdf
    • http://goodshop01.fun/uploads/2020/01/28/luzodalitomapu.pdf
    • http://teamdelta.net/uploads/1/3/0/4/130483062/3033316.pdf
    • http://preferredstocklosses.com/uploads/1/3/0/6/130620364/rilonokakodeto.pdf
    • http://niagaraimagine.com/uploads/1/3/0/4/130488229/69a120fdf3.pdf
    • http://royaloakbrewerschampionship.com/uploads/1/3/0/4/130483402/5063915.pdf
    • http://ollslmc.weebly.com/uploads/1/3/0/4/130483309/luwelokuzi.pdf
    • http://moonandbackministries.com/uploads/1/3/0/2/130289765/9cdbd84bd4.pdf
    • https://lujipuluz.weebly.com/uploads/1/3/0/3/130323158/bezixor.pdf
    • http://blockchainambassador.ca/uploads/1/3/0/2/130272513/130272513.html#guidera+o%27+connor+jobs

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001286.bin
98b06f5090e5344f27640b0735bc24a1248e00e216bb88a7d22a7055b97b4033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1286 7792 bytes

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