Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6badcae029bbc9…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 12:01:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d20da200d089d69e1107e68a988e3380 SHA-1: f8d004c582e988e5539d41f0726295867c7cc158 SHA-256: 5b6badcae029bbc90c9a439a372ceff2d57c4fe8a64069ae5aeb3da4a9d3ffe8
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a seed-phrase/secret-recovery lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/431946152/roblox-redeem-robux-game-hack PDF link annotation
    • http://laboratorium.sman2metro.sch.id//repository/mathep_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/pokemon-go-free-youtube_GM1094591345.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/pokemon-go-free-to-play_GM1094591345.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/robux-robux_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/roblox-password-hacker_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_004_off00005095.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5095 25060 bytes
SHA-256: 74cf9450bb1676c2252f67d5782011a5d0e4fda7b81fcb01ce29a785b8a48848
font_01_sfnt_off00008a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7A 18356 bytes
SHA-256: 60b0283a47b11a7d3b079aa48626d1b3d5c159be2a1d49f12e6aacb8ef7f92ad

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