Malicious PDF — malware analysis report

Static analysis result for SHA-256 e77b7ccc1e296280…

MALICIOUS

PDF

34.4 KB Created: 2021-06-27 07:27:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a8c8e184470ded80b32ee0ef953ddb1d SHA-1: 819ea500504d90cdee68dae6a879f0f402e76ac2 SHA-256: e77b7ccc1e296280323bc28e01a011007051a1dc7d705f3ccabefec4beae5146
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising a 'money hack' for a game. The document body and heuristics indicate a lure designed to trick users into clicking these links. While no scripts were directly extracted, the nature of the embedded links suggests a potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/money-hack-roblox-adopt-me-game-hack In PDF document text
    • https://admin.9credit.vn/data/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/adopt-me-roblox-free-money_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-controversy_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/best-free-roblox-plane-game_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/pokemon-go-free-username-and-password_GM1094591345.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-old-guest-shirt-free_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-account-free-password_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-free-tix-hack_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/robux-best_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-roblox-accounts-2021-march_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/robux-hack-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/can-you-actually-get-free-robux_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_off00002dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DDE 22364 bytes
SHA-256: acf1f47bf19f86b1b8c31125422a5f2b04c8f93b59770fb7ef493bcf3657b1d8
font_01_sfnt_off00005fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA5 19484 bytes
SHA-256: a57fc058c1736b1df4d02db42e6d60332efb83eec03e714527cb5c90f9dd6b7c

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