Malicious PDF — malware analysis report

Static analysis result for SHA-256 4439b1e81543d664…

MALICIOUS

PDF

47.9 KB Created: 2021-06-04 02:18:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 197a2b6834010d819429cd4f2d8146d6 SHA-1: d665f3ad6b657ed891e724db3d86ac7ace5df128 SHA-256: 4439b1e81543d664b67251956681108f87fb1f8b8fbf3e41ac26caeef2b0359c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a game hack generator, which is a common lure for phishing or malware distribution. The ML classifier and specific heuristic firings strongly indicate malicious intent. The embedded URL leads to a known malicious domain, likely serving as a landing page for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/431946152/free-private-server-roblox-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/no-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/freerobux-co_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005249.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5249 26116 bytes
SHA-256: 617a5f4e7a55586045b80ac36e72dfedc80556dfba5275cac3db53d89556ead7
font_01_sfnt_off00008d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D10 3000 bytes
SHA-256: 8c79a5c7b6a03db016ca004b14305d508eed3719cf2808f02aa66beb24e64238
font_02_sfnt_off0000976d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x976D 18668 bytes
SHA-256: 0c1ebf4725aa76ec92a53ac4eb5ef555557a7fe73d781563fc2c7a2c487d54c6

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