Malicious PDF — malware analysis report

Static analysis result for SHA-256 21630b34abdaf935…

MALICIOUS

PDF

36.6 KB Created: 2021-07-01 20:07:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d6f317ccf0f4e20d45ab473d5fdc27f5 SHA-1: 5f13bb2e1d1f6a36f3dab92f2fa9782430b34fab SHA-256: 21630b34abdaf9350de94c2e9a75368266665ffefb0cf7f0222f3fb8a59c1606
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a known malicious domain, masquerading as a game hack generator. The document body and heuristics indicate a lure for 'free generators' or 'game hacks', specifically mentioning Roblox. This pattern suggests an attempt to trick users into visiting malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/roblox-hacked-on-march-18-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-javascript-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/cheat-codes-little-mix-roblox-id_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-jake-paul-merch-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-in-roblox-to-rank-up-a-group_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/games-on-roblox-that-allow-free-song-id_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/pastebin-robux-account-hack-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-always-works_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/dead-mist-2-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-hack-generator-club_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/gladiator-simulator-strength-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-robux-with-artmoney_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/snipr-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-javascript-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-in-roblox-freeee-worksss-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_002_off000035ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35EA 22796 bytes
SHA-256: d0abf3d47d5238a9eb8120592aa0cb74d37dce0b5be25e3bd9908015bc9713be
font_01_sfnt_off000068c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C4 19508 bytes
SHA-256: b049e1315f50cd25ba1ddb9c1c3c08fa4a31f3a8a23982721e1c7bc530970492

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