Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc4592c6dd5ee0f…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 07:57:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 71d81cd4bfaa204a43e07caf94f0d2eb SHA-1: 4164b9df269e7be685b1b3e1fea927d32b124309 SHA-256: 7dc4592c6dd5ee0f830cd38465c1e4a0bd8eaed1a38fc69700e8158fd9bd07da
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URIs that are disguised as links to game hacks or generators, a common lure for users. The primary malicious URL identified is 'https://netcdn.online/app/479516143/hack-client-game-hack'. While no scripts were explicitly extracted, the presence of PDF-specific URI heuristics and the ML classifier strongly indicate malicious intent, likely to redirect users to a malicious site for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/479516143/hack-client-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/demon-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-printables-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/static-moonactive_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/tiktok-free-followers-generator_GM835599320.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pubg-mobile-uc-xyz_GM1330123889.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000554a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x554A 25536 bytes
SHA-256: 5cc3e8a04e4d53ba3640ab6f64a037ce18fb25718b6d89b5f36b50e92086711e
font_01_sfnt_off00008f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F18 17812 bytes
SHA-256: af75091dd1ed9ff92a17a8bd9a3d097f77d0b86e0c60fbcf01e38630a3bb1c5f

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