Malicious PDF — malware analysis report

Static analysis result for SHA-256 5513941bcef3ea41…

MALICIOUS

PDF

44.6 KB Created: 2021-05-13 10:39:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5b6595666ddebb47e5accfb270af0267 SHA-1: fcf95b85aebfe144458007e132e8255ee90cec6e SHA-256: 5513941bcef3ea41d2260b3033e0ab500f7803a2b98caf647af2f006f39a108c
142 Risk Score

Malware Insights

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

The PDF document contains a lure for game hacks and free spins, directing the user to a malicious URL. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may also attempt to phish for sensitive recovery secrets or private keys. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://netcdn.xyz/app/406889139/master-coin-free-spin-game-hack PDF link annotation
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-robux-please_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/roblox-a_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-daily-spin-free_GM406889139.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/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2skh.sch.id/__statics/gudangsoal/files/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b30.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B30 24584 bytes
SHA-256: b375dbbeb5a9941082ab6d9c02b6c6e5cb4b8b4b8d9dee9947b96bf328bc7312
font_01_sfnt_off00008376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8376 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00008d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D19 17884 bytes
SHA-256: 2eace5707960ab6674c345fc5925bb74d79b72c9d0e947ec779627780b9711cb

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