Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa50aa4ebea9ba6…

MALICIOUS

PDF

33.4 KB Created: 2021-06-29 06:39:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6bf6d976f52ae00f9f518e8f98a1273e SHA-1: 55ca56e4ba1cee85bef62da2ad08430825dd3a7c SHA-256: dfa50aa4ebea9ba61a1d9467d40e5ad1661822fc7d013c482fbea03d729fa5aa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically a lure for free Robux or game hacks. The ML classifier strongly flagged this PDF as malicious. The embedded URLs and the document body text indicate a social engineering attempt to trick users into visiting potentially harmful sites, likely to download further malware or engage in credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/get-100-000-000-000-000-000-robux-for-free-game-hack In PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/how-to-get-free-robux-2021-ipad_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/free-roblox-clothing-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/jailbreak-roblox-hack-dll_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/hacks-for-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/roblox-dominus-frigidus-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/robux-free-online_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/roblox-cheats-for-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/roblox-jailbreak-speed-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/how-to-make-a-roblox-skid-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/inf-jump-hack-script-for-phone-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/roblox-wood-tycoon-2-cheats_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/cheat-engine-cheats-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/how-to-get-free-robux-redeem-code_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn9blitar.online/__statics/gudangsoal/files/free-robux-without-downloading-apps_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_off00002cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CBC 22008 bytes
SHA-256: 588eb261ec9be8dfc2fa9637c37585fcdb28225def62ebe9116aec1e19457d4e
font_01_sfnt_off00005d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D87 19096 bytes
SHA-256: ebb25061c3a77e9841194de3079527c1fd5987fab192daaee1920a221cad71ab

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