Malicious PDF — malware analysis report

Static analysis result for SHA-256 b697a05b289ebbb0…

MALICIOUS

PDF

47.8 KB Created: 2021-06-04 01:24:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 45742648b77be155e43e2e7441248096 SHA-1: 170f05b101376d9b24fe426c42f0bb0fde579d06 SHA-256: b697a05b289ebbb05bab27f0efd95d3c2ac96906201ef58bbb8b690aff5afaae
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that offer game hacks and generators, indicating a lure for potentially malicious downloads. The ML classifier strongly flagged this PDF as malicious, and heuristics identified it as a game hack redirector. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/download-hacked-games-coin-master-game-hack PDF link annotation
    • http://library.smpn2-byl.sch.id//repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/114-hacks_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52E7 25064 bytes
SHA-256: 732a00f6be0bb5f858523869839c251321faf0152aa7fa5c379afb8359fee470
font_01_sfnt_off00008b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5C 3380 bytes
SHA-256: cb8371cc187c45116d0984119c2893dd3db0d7f7d568d007a419406e6ca9f389
font_02_sfnt_off00009749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9749 18556 bytes
SHA-256: 872856dc36b7d0cde2667ea9daae6868ef6ed6eada75fea978a440faa6a0cafa

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