Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3387ce412b2d11…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 21:49:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b6a60fe5215b2ffb3808a4af1d1759f5 SHA-1: 9d4d87539f82fb2b79ea2b092fe7b0708d0d0168 SHA-256: ec3387ce412b2d1167e50ddde0ecccc5740b7415d711af4c022265375d723f5d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free spins to entice users to click on embedded links. The primary link, http://netcdn.tw/app/406889139/free-coin-master-spins-links-2021-game-hack, redirects to a malicious website. The document body contains numerous other links to similar game-related hack content, suggesting a phishing or scam campaign. No scripts were extracted, but the PDF structure and embedded links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-coin-master-spins-links-2021-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/how-to-get-any-gamepass-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/greenville-roblox-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-pastebin-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/tiktok-freein_GM835599320.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-put-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hoiw-to-get-anamtion-ack-for-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-script_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/i-need-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-roblox-accounts-new_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
font_00_sfnt_off0000302b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x302B 22740 bytes
SHA-256: ee05f33d15a4fb226826f9c966a8ce733f956d80c70a3012f28c9e3513ce7d61
font_01_sfnt_off000062ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EA 18748 bytes
SHA-256: 5e5e3d15871b02552e5fad4f875fae1ebedcacb3eb465dcd628b21570bef926e

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