Malicious PDF — malware analysis report

Static analysis result for SHA-256 15cde0a068a4c369…

MALICIOUS

PDF

33.0 KB Created: 2021-06-30 04:24:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fdc2c4b973fb4bfc77dba9cae7f7f5ad SHA-1: aaebd426ea82e7b681d061c74c8fa02f38986750 SHA-256: 15cde0a068a4c3691207f53cd1f66a8f64c4835e297a97c20248df5eb67a8c33
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and text referencing 'free Robux' and game hacks, a common lure for malicious content. The primary URL, http://netcdn.co/app/431946152/free-robux-inspect-hack-game-hack, is flagged by heuristics as a redirector for game hacks. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into downloading or visiting malicious sites, aligning with a spearphishing attachment tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.co/app/431946152/free-robux-inspect-hack-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-skins-free-download_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/monkey-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-roblox-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/every-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-look-like-a-guest-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-do-you-hack-accounts-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/de-pride-isle-sanatorium-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-any-account-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-robar-cuentas-de-roblox-2021-pastebin-akaka_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off00002afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AFB 22032 bytes
SHA-256: b628bf7cb2c141adb0a6511ffcdd86c06efa9852d3beb0abf899b9e3c9be058a
font_01_sfnt_off00005bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC9 19164 bytes
SHA-256: 010e6c36ad000a2368a2be0d47c72ce1764131d29ca33c223871712c51e4476e

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