Malicious PDF — malware analysis report

Static analysis result for SHA-256 918c48fa010d295e…

MALICIOUS

PDF

34.8 KB Created: 2021-06-28 02:49:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b6d3548acb06e912ad178e4ca45cd215 SHA-1: 0967da0a869fd5a5f3fe5728b17e65568d5dd7fd SHA-256: 918c48fa010d295ec0771d0a714780be972d75ee48395278369ef2e7ee1cf658
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a lure in its body text, promising free Robux and game hacks. These links direct to a known malicious redirector infrastructure, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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/free-robux-add-ons-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-headphones-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/300-robuxs-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-from-inspecting-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/tiktok-free-speech_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/como-conseguir-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-rthro-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-system_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/get-free-robux-pastebincom_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/is-minecraft-dungeons-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_off00002fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAD 22976 bytes
SHA-256: 6c82ea13be622c8969a369e40e7591e891d6ddb440bd560eaca68ae38e73d046
font_01_sfnt_off0000634b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634B 18924 bytes
SHA-256: c87b919e1f2b002adc791d2d5ab1648eda12d0a890b8a2a4b7622cfe9abeb222

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