Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f5f49c1ad9c2cd…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 00:06:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c6e5a83525d38aa078800f28e448c062 SHA-1: 382100d45a20efdcbc4db28c19ccb100606d5c58 SHA-256: 58f5f49c1ad9c2cd40d1455cbd8db0d5919734bb2d892b56a64ca6ec48e17ac1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of 'Free Robux' and game hacks to entice users to click on a malicious URL. The primary URL, http://netcdn.tw/app/431946152/free-robux-picture-game-hack, is likely a redirector to a site that will attempt to download and execute a secondary payload. The document's structure and embedded links strongly suggest a phishing or scam attempt designed to compromise the user's system.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-picture-game-hack PDF link annotation
    • http://katalog.stikesmukla.ac.id/repository/how-to-hack-in-roblox-ninja-legends_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/dll-file-cheats-on-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-login-free-games_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-website-bloxburg_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/admin-free-robux-script_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/slurp-hack-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-faces-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-medieval-hood-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-do-you-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/oblivion-hack-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/fun-free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-roebucks_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
font_00_sfnt_off00003294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3294 22448 bytes
SHA-256: e6961136a4f7dc9ef365c627ad92fd8924803770fde9d566f584ea1f320ef4bf
font_01_sfnt_off000064bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64BF 19092 bytes
SHA-256: 9715d995c23983065a7df377792eaacf2fec96b8330b74126226ea3dcf6b4e29

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