Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffba4d83ad560655…

MALICIOUS

PDF

35.1 KB Created: 2021-07-08 13:45:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d6dbfe38b7c1cc45e2724a940b8d694a SHA-1: 743cc02d93bb94eca12aafae1c60c01f5eaf3974 SHA-256: ffba4d83ad5606550a0ce9cbd852bc050eed7bcfe11955aceea75c3d54039b8a
160 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links that redirect to known malicious infrastructure, specifically advertising free game hacks and generators. The document body and heuristics indicate a lure to trick users into visiting these malicious sites, likely to download further malware or engage in phishing. The ML classifier strongly supports the malicious nature of this PDF.

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.tw/app/406889139/free-spins-for-coin-masters-game-hack In PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/how-to-buy-things-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/roblox-csgo-cheats_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/what-tiktok-free-will_GM835599320.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/install-free-game-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-learning.mtsn-1-pasangkayu.sch.id/__statics/gudangsoal/files/roblox-hack-ga_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
stream_002_off0000339f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x339F 22816 bytes
SHA-256: 341a7fbbe59ed36213642d28bb6929455352c1afeb1ce2fd0bf91f72778da167
font_01_sfnt_off000066bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BB 18176 bytes
SHA-256: 0b37b87f907bc50fa1e450587a0e1f43116f92b011bc5b47444974eee354eb2f

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