Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1d550898adbfa1…

MALICIOUS

PDF

49.1 KB Created: 2021-06-03 09:28:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3c69be06ee14bf17ccff9e3a3a972c9b SHA-1: 830e976cd194ba266c11ece50b37bcc70f061d1a SHA-256: 2b1d550898adbfa1c37ea12e34925c5fa9592074f3b29a0dc41aa6cfc025807f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' lure. The embedded URL, https://netcdn.online/app/431946152/roblox-fun-com-free-robux-game-hack, likely serves as a redirector to a malicious site or download. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick the user into visiting a potentially harmful external resource.

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/roblox-fun-com-free-robux-game-hack PDF link annotation
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/is-pokemon-go-free-on-ios_GM1094591345.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-roblox-toy-june-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-heaven-free-spins-today_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_off00005096.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5096 26992 bytes
SHA-256: 0bf96e676fd44eb843f1f4e7192196454b5f03ce09e6d4e88fb82b3ed83ed007
font_01_sfnt_off00008f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9E 4008 bytes
SHA-256: 982b414f0c1a2f334cbcfa74b37c63e373061dba1812816e371faa6e65399a16
font_02_sfnt_off00009d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D2D 18348 bytes
SHA-256: 9560f0e6f9a4e6be006083e3696e79311a38bb173f302534750988b281bae61f

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