Malicious PDF — malware analysis report

Static analysis result for SHA-256 19019f4f3e9cb420…

MALICIOUS

PDF

42.7 KB Created: 2021-05-15 16:08:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b03c67aed7baa8fe2fa02540474995d5 SHA-1: 5557516e669fcaa07f757ce101b62845f0e89c29 SHA-256: 19019f4f3e9cb4208bec0b009b48a7a62b18947c7e3364ea3e17672fa3dfa0ce
82 Risk Score

Malware Insights

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

The PDF document contains a prominent link and text related to "Coin Master Hack Spins And Coins Unlimited Free", which is a common lure for users seeking game cheats. The heuristic PDF_GAME_HACK_REDIRECT_LURE confirms this, and the ML classifier strongly indicates maliciousness. The embedded URLs likely lead to further malicious content or downloads, attempting to exploit user interest in free game resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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/coin-master-hack-spins-and-coins-unlimited-free-game-hack PDF link annotation
    • http://vedrachemicals.ro/images/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://vedrachemicals.ro/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://vedrachemicals.ro/images/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • http://vedrachemicals.ro/images/robux-download_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
stream_003_off00004ac1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC1 24892 bytes
SHA-256: cd2e275c9410c969ad39b5a2ae0849f2f1233c6c5741662d7d622919e724de24
font_01_sfnt_off0000834a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x834A 18752 bytes
SHA-256: 9894c068b10d635aa02e8d25afb59d141e90fd875449b50e52c6a3fbfc43112a

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