Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1fa42a505f45605…

MALICIOUS

PDF

48.6 KB Created: 2021-06-03 10:08:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 298e14f1c2a16c4f6044953035009588 SHA-1: 74c0f18fdf2155c57f39b20d4720c503de7cf23c SHA-256: f1fa42a505f456057b4787fcbf354ae5d065f83b80793275062de8775aa47a87
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for a "free Robux generator" and presents a fake CAPTCHA to trick users into clicking a malicious link. The embedded URL, https://netcdn.online/app/431946152/robuxlove-net-free-robux-game-hack, is the primary indicator of malicious intent. No scripts were extracted, but the document structure and heuristics strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.online/app/431946152/robuxlove-net-free-robux-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-redeem-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/link-for-free-spins-on-coin-master_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000514f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x514F 27348 bytes
SHA-256: ba93c151d3445fb2642ae94ab1c672b50971d38a31b2af35a83332d26f7a75d9
font_01_sfnt_off00008e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2C 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3E 18308 bytes
SHA-256: b28048e238ef22262afd6ecc0e077496c49329ec7afac569f73d1b46f1ce60f0

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