Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74f548cd83cca64…

MALICIOUS

PDF

36.1 KB Created: 2021-07-03 19:14:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9af098808a6f343ba73aa4afd57cbff7 SHA-1: 0c229d5442259335a757ac03230dc2ea4ca41212 SHA-256: e74f548cd83cca6478933f6d34ffed57e147e4ea7450d243a014a1c6b966e31b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for 'free Robux' and game hacks, directing users to external URLs. The presence of multiple game-related hack links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content or phishing sites. No scripts were extracted, but the document's structure and embedded links strongly suggest a social engineering attack.

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-without-doing-anything-2021-game-hack PDF link annotation
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/roblox-prove-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/course-obstacle-2021-roblox-cheat-code_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/roblox-admin-hacks-download_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/free-stuff-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/games-to-get-me-free-roblox-now_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_off000032fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32FB 22292 bytes
SHA-256: d137524515c085555dbebc7496cd1414179c4c8f6426ad711580efd3ad488807
font_01_sfnt_off0000649b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649B 20220 bytes
SHA-256: 9b30e2885eb5843fedd856b186065d0d919d61cb100e3271a00bcc18fb5681c8

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