Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b5d94b9eefba8d8…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 22:41:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: dd7c6979466125ca1acf119b0a66cff9 SHA-1: b6584228c7abb516a4c2400b7ca30fdb323f0043 SHA-256: 4b5d94b9eefba8d89fc1aa3072edaa7657a6db6223bdf6e89868852655dd630f
102 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' redirector, specifically for Roblox. The document body and extracted URLs reinforce this, pointing to the URL http://netcdn.tw/app/431946152/how-to-get-free-robux-on-roblox-game-hack. This pattern is consistent with social engineering to trick users into visiting a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/how-to-get-free-robux-on-roblox-game-hack PDF link annotation
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/simplysarc_GM479516143.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-with-a-link_GM431946152.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/how-to-get-robux-with-hacking-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/lua-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/how-to-get-gojirasaurus-free-ancient-earth-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-rebirth_GM431946152.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://elearning.man1inhil.sch.id/__statics/gudangsoal/files/roblox-jailbreak-airdrop-spawn-hack_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_off000032c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C5 22468 bytes
SHA-256: 13fec313dd4b318b5986d3255c00d1a11fcc6242f36bcf6c4f0bd525a853a264
font_01_sfnt_off000064f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F8 19056 bytes
SHA-256: 22e79bf31db193f266ad8ef0f47d1a9e736b831aec58415b80c9b2f57893c59e

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