Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c7f24a25b2c56a8…

MALICIOUS

PDF

34.5 KB Created: 2021-06-28 15:12:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 134e97d7b2da3b73973dd00f4aa432e1 SHA-1: 2a4911cdc75efb96f9df3b2b27ad91c9be519400 SHA-256: 9c7f24a25b2c56a8b3a372a3634eabae9b6610c09f76cd77b98e44dc16fc0e46
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link to a known malicious redirector, disguised as a lure for game hacks and free currency. The document body and embedded URLs reinforce this theme, suggesting an attempt to trick users into visiting malicious sites. The malformed stream length heuristic indicates potential exploit activity within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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-inquiditormaster-game-hack In PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/auto-keyboard-for-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/free-robux-no-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/roblox-infinite-jump-hack-with-pictures_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/easy-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://elearning.man1kotakediri.sch.id/__statics/gudangsoal/files/easy-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
font_00_sfnt_off0000306d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306D 21772 bytes
SHA-256: 7687e081b44f2494ccc50058c1b3fe18d2355362e2148bbb445b708fe1b5ef0a
font_01_sfnt_off00006065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6065 19544 bytes
SHA-256: 12d0398b27ed4b8869214ab269ea2b377e9fe64f1523e288ccb6e46c88d578ec

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