Malicious PDF — malware analysis report

Static analysis result for SHA-256 3512c6c7cc2edb28…

MALICIOUS

PDF

42.0 KB Created: 2021-05-17 05:28:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f6a48595487185bf9e5890b645f73d98 SHA-1: dd31309b5f196f39d33b5b0d3b5e9ebe19ff4d3a SHA-256: 3512c6c7cc2edb284793eb6da21bc7f17d1607f694aa6639c70235739f72694e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) 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 0.9971

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-apk-no-fb-login-game-hack PDF link annotation
    • https://loba.com.vn/public/upload/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-items_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-game_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-get-free-spins_GM406889139.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_off00004a85.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A85 25376 bytes
SHA-256: 3a5aeb6ae36685d063755341f6cf4fad285bb8350f5fb644973040b03c74ee07
font_01_sfnt_off00008144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8144 18504 bytes
SHA-256: 78d6517c7e7bb6e1c795c442c03a5e1c53288b74fb53ad17eab4d7ee61bd6ac2

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