Malicious PDF — malware analysis report

Static analysis result for SHA-256 a391c0575b87a97e…

MALICIOUS

PDF

31.7 KB Created: 2021-07-05 01:13:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 40b340e60696a7fe816773013cee837b SHA-1: 26129b0a2fa60f76ae84d259938e05810e92c8d5 SHA-256: a391c0575b87a97e418285d27e92c3e237ecb16799b01cd33991786cf1c3d34a
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including a prominent one to 'netcdn.tw', which is flagged as a lure for game hacks. The document body and extracted URLs suggest a social engineering tactic to trick users into visiting potentially malicious sites for in-game currency or cheats. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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/406889139/coin-master-free-coins-game-hack PDF link annotation
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/speed-hack-tool-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-robux-hack-on-desktop_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-tiktok-followers-com_GM835599320.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/wurst-112_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/roblox-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/dominus-free-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-robux-codes-june-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003246.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3246 23544 bytes
SHA-256: 2a783c6c3ed22d55ef539fd6a5767353ae8f0804230c62e2325c83e04dc2eee1

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