Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a663f49828c817d…

MALICIOUS

PDF

43.4 KB Created: 2021-05-16 05:34:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 37eb7738994c703f7fe59b46e75d7958 SHA-1: 0f11259c128d5ff4fa5fcd7871c293e422929739 SHA-256: 5a663f49828c817dcb5d94c0c7b64037fadf61ad8940275e350bdd0573393f5f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9969

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/how-to-get-free-spins-grom-coin-master-game-hack PDF link annotation
    • https://loba.com.vn/public/upload/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/earnrobux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/rbx-website_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/robux-redeem_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004670.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4670 28376 bytes
SHA-256: 7d01eb8751ac5ef2d1ae7217881a0d6947205ddfa65f88d2a2cd13e82fc94218
font_01_sfnt_off0000873f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873F 18308 bytes
SHA-256: 54bc4cb339ab54a414e81dbc8c78cd983f23e840174d14985084a71892f993b4

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