Malicious PDF — malware analysis report

Static analysis result for SHA-256 14191fd2e7814976…

MALICIOUS

PDF

41.0 KB Created: 2021-05-17 10:31:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8f6d3eade22bfa7e6bc9919944f11251 SHA-1: 1942aa3aaa61057aabc9c895042aed29958c19b7 SHA-256: 14191fd2e7814976e75c89cfc468ce5f6c2f0a7357aeedf63cd428758b2068ae
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 0.9971

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/479516143/how-to-get-minecraft-for-free-on-computer-game-hack.
  • 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/479516143/how-to-get-minecraft-for-free-on-computer-game-hack PDF link annotation
    • http://eltisstudio.sk/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • http://eltisstudio.sk/images/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-daily-spins-coin-master_GM406889139.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_off000046c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46C9 24100 bytes
SHA-256: 854348f2157d2499df7c95da8f22df8d9da12b706153ee6f50879b400339f2a2
font_01_sfnt_off00007d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D52 18452 bytes
SHA-256: fce6c86cc1ad63ab9ce068c6620c453958f48a84b612bdc7216287e66eae0497

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