Malicious PDF — malware analysis report

Static analysis result for SHA-256 558cd8eeaf78fae6…

MALICIOUS

PDF

47.9 KB Created: 2021-05-14 15:17:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 26e2dd4f27ed5aa5cfba2c5854382885 SHA-1: d4ee69d2f7ac2a7320f6ea7bc0789e46b48daeab SHA-256: 558cd8eeaf78fae637451ebea463ccb232967a65f98d120d22594828f313ee7e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The primary malicious URL identified is https://netcdn.xyz/app/431946152/earnrobux-game-hack. The presence of embedded links and the ML classifier's high confidence score indicate a deliberate attempt to lure users into potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://netcdn.xyz/app/431946152/earnrobux-game-hack In PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/coin-master-deals_GM406889139.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/link-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/coin-master-heaven_GM406889139.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/robux-claimer_GM431946152.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning.m2mpekanbaru.sch.id/__statics/gudangsoal/files/coin-master-mod_GM406889139.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_003_off00004c19.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C19 36348 bytes
SHA-256: c71765a4fb6af6a1baefc2ddfed88442e8b7123f6534d22496ab83c6a29e327d
font_01_sfnt_off000099f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99F5 18076 bytes
SHA-256: 2721194a66b32dfdaea4e26ed0bd84b304de41eeda81871a4ffc347c5a8adb25

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