Malicious PDF — malware analysis report

Static analysis result for SHA-256 258e18b47ebc6de7…

MALICIOUS

PDF

34.9 KB Authoring application: Nitro PDF
MD5: d2f1191a065d96a08c4cc8e600ed7211 SHA-1: 5908bfc819df4e1f6bf149f81f96fe822face8c5 SHA-256: 258e18b47ebc6de79d35ad62a55ec53647aa973b27ce185ed7b528d71b3b320f
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files. This suggests a link farm or a distribution mechanism for further malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output further support its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://bamestate.com/uploads/1/3/0/6/130604349/728391.pdf
    • http://cannabizstudios.com/uploads/1/3/0/7/130740344/b19f7216.pdf
    • http://dollarmovement.com/uploads/1/3/0/5/130551720/675508.pdf
    • http://natureguidetrainingbotswana.com/uploads/1/3/0/2/130287419/595cb0ef41dc6a4.pdf
    • http://americanepilepsyinstitute.com/uploads/1/3/0/2/130289460/8270656.pdf
    • http://shoes.boutique/uploads/1/3/0/2/130273581/wedudumek_degagulabafijap_debuwoji_vadizipaxo.pdf
    • http://mygetfitkitchen.com/uploads/1/3/0/3/130323552/labelenexoni.pdf
    • http://stompyedits.online/uploads/1/3/0/3/130313649/f4d0a471e6.pdf
    • http://brandgrenade.com/uploads/1/3/0/7/130738707/8795176.pdf
    • http://allsaintsws.net/uploads/1/3/0/4/130483989/2163269.pdf
    • http://denvermetroprotocols.com/uploads/1/3/0/4/130488969/8313fc187f6b.pdf
    • http://drperryslp.com/uploads/1/3/0/5/130590384/06793.pdf
    • http://murielanna.com/uploads/1/3/0/3/130313340/1dbb69b824015c.pdf
    • http://xvjpf.com/uploads/1/3/0/2/130289481/7860316.pdf
    • http://svanarsdale.com/uploads/1/3/0/7/130739831/578d45.pdf
    • http://slaten-wedding.rominastiebenphotography.com/uploads/1/3/0/6/130639256/130639256.html#youtube+blender+tutorial+francais
    • http://denvermetroprotocols.com/u

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e53.bin
bfc8c4c915bcd17f1f40ee07b601ae506f79b3dbc296070a827bcbc2c8537a27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E53 7664 bytes

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