Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1b0c5cd37a4ed12…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 16:45:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6d588ced7b6332fac9294efda9fa493f SHA-1: b0d2ea0518a895a97527c3040b978600bfba9815 SHA-256: f1b0c5cd37a4ed122761dd4ed8849e20a672e0735a8492b3fd0180f1cad0b5af
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to game hacks and generators, specifically targeting 'Robux' and 'Coin Master'. The primary link, http://netcdn.tw/app/431946152/rewardrobux-com-game-hack, is flagged as a high-risk lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt, likely to redirect users to malicious sites or trick them into downloading further malware. The ML classifier also strongly indicated maliciousness.

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/rewardrobux-com-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-no-survey-no-human-verification-no-download_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/ban-script-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/the-crew-cheats-at-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/earn-robux-com_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/infinite-jump-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-how-to-pass-human-verify_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-inspect-code-2021_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3022 22184 bytes
SHA-256: af8a88b3c3852201f1aa49c3b7bfe96a62ddf873740d20fc24f79796e70e60e6
font_01_sfnt_off0000614d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614D 19152 bytes
SHA-256: 8897bdbdddddb4c8ea22b3534d777e6870992c4c83dc3d62d7fe7b9be2d9a1da

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