Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a13afbc30f547d…

MALICIOUS

PDF

43.1 KB Created: 2021-05-19 06:50:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 33353edf182e150bced86f7a447e2fd0 SHA-1: c58057d3c1b426dded6582c653431bcec91ecad1 SHA-256: f8a13afbc30f547d7d25175363e5f492ca2981a055839fbfcf58cf795df45aed
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free Robux' and game hacks, directing users to a malicious URL. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/you-promised-my-son-free-robux-game-hack PDF link annotation
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mlc3.ma-alirsyad.sch.id/__statics/gudangsoal/files/minecraft-xbox-360-free_GM479516143.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_off000045af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45AF 26816 bytes
SHA-256: 0e1c1015081545a70ad629ef12da2f70dfe6746dac0e6960537786a238e6abb2
font_01_sfnt_off00008397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8397 19260 bytes
SHA-256: 86e86c6d1a3146e1f407edd8c9cf68c56566e4a3a2a05930f639aef478547eb3

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