Malicious PDF — malware analysis report

Static analysis result for SHA-256 caff92ff2f504322…

MALICIOUS

PDF

33.5 KB Created: 2021-07-25 03:15:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2503bdf6524a8e1ce490b3c64d7746c6 SHA-1: e5a0bd886d14a36b24193c66855a727b4d224f43 SHA-256: caff92ff2f50432213c2068f295ff8efdea9508e4eeca9dd010ef7b7ecddc216
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and document body text that promote 'Free Robux' and game hacks, directing users to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that the primary link leads to known malicious redirector infrastructure. The document's content and the identified malicious link suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://netcdn.tw/app/431946152/funblox.xyz-free-robux-game-hack In PDF document text
    • http://lib.perpuspersada.my.id/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://lib.perpuspersada.my.id/repository/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6F 22600 bytes
SHA-256: d32d6af057a6e916b8d3209f0689fc3b34cfcbbd809a818c2af9306d344e8a15
font_01_sfnt_off00005ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF5 18604 bytes
SHA-256: 4f19dc3d0a3637c7e2dc0586789f2f07baab943710432e15838765b7ff05be1b

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