Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3eaa679442b544…

MALICIOUS

PDF

35.2 KB Created: 2021-06-26 12:15:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 544360252357f4f0107420b713c94c9d SHA-1: 7cf037436f30393ebac9335bc6731ff915564589 SHA-256: 6a3eaa679442b5445e441b99cee11295e00d676b5874076768ca6680e9649b9c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a known malicious redirector infrastructure, specifically advertising game hacks. The document body and heuristics confirm the lure is related to obtaining free in-game currency or hacks for games like Roblox. While no scripts were directly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content.

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/assassin-roblox-hack-on-the-sky-game-hack In PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/hoow-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/robuxglobalcom_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/how-to-speed-hack-in-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/avatar-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/dsploit-hack-roblox_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/hacker-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-boy-shirts-roblox_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-game-without-verification_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
font_00_sfnt_off00003286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3286 22324 bytes
SHA-256: be77cccdc33b3557e57585696e79222d879a08213071df7a0fc39432dbe41891
font_01_sfnt_off0000644e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644E 19120 bytes
SHA-256: 054f4dcdfacd36a5fd5c221ad8235bac2b3c168886dadafe4f9a435cc8ca5a00

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