Malicious PDF — malware analysis report

Static analysis result for SHA-256 1126ab4975f10efd…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 04:31:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4538e854054ddd339e92768fa3492515 SHA-1: 9a58e5df431e1e5a4b83b9d4d33d7e858947b9b9 SHA-256: 1126ab4975f10efd1cba2dd155cd547ecc18fad15f10b2dffe249ff19f9c6314
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack'. The embedded URL directs to known malicious infrastructure. The document body also contains the same URL, reinforcing the lure to click on it. No scripts were extracted, but the primary attack pattern is a social engineering lure to a malicious site.

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.tw/app/406889139/hack-coin-master-without-root-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/4-op-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/como-tener-dinero-infinito-roblox-high-school-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-draw-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-how-to-hack-rpg-games_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/2021-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/claim-box-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
stream_002_off0000310e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x310E 22728 bytes
SHA-256: 572334e78f886d43bf5030ab1a503444607ff1d5337b68fc4717c3de076d9c77
font_01_sfnt_off00006401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6401 18508 bytes
SHA-256: 7412962c38736f31792a490788021e885b84a7fc2ab52d8639a2d80332116790

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