Malicious PDF — malware analysis report

Static analysis result for SHA-256 1463df65b87a203f…

MALICIOUS

PDF

46.1 KB Authoring application: Nitro PDF
MD5: 550b467c5f3f59ecbbc3f6179ab68991 SHA-1: 4137f571ccb1e58e8dafde148430b6fe98c0d75d SHA-256: 1463df65b87a203fe62ac9c8344a16b4ab6ca5c67b0dec2276dc669c7e411983
152 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 are structured as numeric slugs, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The embedded URL points to a PDF file, suggesting a multi-stage attack where this document serves as a lure.

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://mail.bester-kindergeburtstag.de/uploads/1/3/0/6/130620213/puxusadesexuvaburoz.pdf
    • http://bizania.com/uploads/1/3/0/6/130620916/6089611.pdf
    • http://natashahortonphotography.co.uk/uploads/1/3/0/7/130776474/23602fe0.pdf
    • http://myoptique2020.com/uploads/1/3/0/6/130639343/4357aaf715dfc7.pdf
    • http://joshweisgrau.com/uploads/1/3/0/2/130272284/peforalumeromodeguk.pdf
    • http://bestresult.space/uploads/1/3/0/8/130874059/e6e14c1f.pdf
    • http://fcfcp.com/uploads/1/3/0/5/130550715/1925246.pdf
    • http://arielandresalmada.com/uploads/1/3/0/4/130488382/tizez.pdf
    • http://jkstreatments.com/uploads/1/3/0/4/130493714/261d78717e15a50.pdf
    • http://nom-vula.com/uploads/1/3/0/7/130775518/6680651.pdf
    • http://brunchmemphis.com/uploads/1/3/0/4/130477176/pofidutor.pdf
    • http://vps20.pleasingfood.com/uploads/1/3/0/9/130969492/130969492.html#disney+animal+kingdom+hotel+booking

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005be0.bin
700670d08f6626aa31485096d35fbb224945062632fb08f82e25c67dc90f660f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE0 9032 bytes

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