Malicious PDF — malware analysis report

Static analysis result for SHA-256 e781b3522a7c91cd…

MALICIOUS

PDF

35.8 KB Created: 2021-06-26 00:38:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a002f7ab5bee5ecb61b684832311423a SHA-1: c62a1f55996f84e44f7f3f93766373346d3e03c4 SHA-256: e781b3522a7c91cd42eb46bd9720d7fcceda80b0930dafd4d9049a3d59564753
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with 'game hack' content, suggesting a phishing or malware distribution scheme. The embedded URLs, such as http://netcdn.co/app/431946152/cheat-engine-robux-hack-game-hack, are designed to trick users into downloading further malicious payloads. The ML classifier also strongly indicated maliciousness.

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/cheat-engine-robux-hack-game-hack In PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/roblox-changename-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/artificial-intelligence-roblox-hack-streets-void_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/command-for-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/how-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.manurululum.web.id/__statics/gudangsoal/files/free-minecraft-education-edition_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_off00003676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3676 21972 bytes
SHA-256: ba0f34817b485da443b1b4d9a45a6a7ce73d94d492a386c68d3545c9d11af92e
font_01_sfnt_off000066c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C0 19112 bytes
SHA-256: b2eae333f06a78d3f079b253068280c741e6d9f9336a0394f1f74241dfa656ed

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