Malicious PDF — malware analysis report

Static analysis result for SHA-256 76471016b2269789…

MALICIOUS

PDF

45.3 KB Created: 2021-05-16 12:38:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bc5b15a4e2b8e43f7df43124fc175faa SHA-1: 9f187a82e4f2a136c097e6248236bcd5b8cc90ae SHA-256: 76471016b22697891da699232dfb3a9fb3cc7d378583ee74ad3a8d94bbf778fe
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/coin-master-coin-link-game-hack PDF link annotation
    • http://glll.de/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://glll.de/images/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://glll.de/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://glll.de/images/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://glll.de/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://glll.de/images/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://glll.de/images/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • http://glll.de/images/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://glll.de/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://glll.de/images/roblox-system_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://glll.de/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://glll.de/images/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://glll.de/images/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.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_off00004d4a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D4A 24912 bytes
SHA-256: a6c40307aab4e5505c0968c8a91e95e3432c543aa7de43e804530cbddaa7c81a
font_01_sfnt_off0000863c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x863C 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEE 17716 bytes
SHA-256: 6b6be525affa70ffc107ac4c88dd9d04ef97920621a7989faf1a85e6391895c0

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