Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a7d5013a9d9c7d…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 19:11:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 77e6f124ea1bc77b226d3a2c55286ca7 SHA-1: 103abbdcd30f11011b0bbe3ea636acd2b4e7eda8 SHA-256: 90a7d5013a9d9c7d8608fdfc484097a5311dcc9a65664291a0acb477a68592bb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains numerous URLs and text related to game hacks and free currency, strongly suggesting a lure for potentially unwanted software or phishing. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the embedded URLs are the primary indicators of malicious intent, likely leading to a download or a phishing page.

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/431946152/roblox-hack-free-robux-no-human-verification-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-free-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-pubg-uc-without-human-verification_GM1330123889.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-human-verification-or-survey-2021-on-android_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-free-play-guest_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-apk-android-free_GM479516143.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_off00002e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E24 22184 bytes
SHA-256: bce56c4b32266f2da4dd78571eb9eb803371d39a3ab2a8fbe7eeba5fa25daa76
font_01_sfnt_off00005fa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA3 19580 bytes
SHA-256: ceed89941c35ceb6c39c59dfdb48702405407ba43acf836df7448c30694a7c0e

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