Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1d70fd4d2868b4…

MALICIOUS

PDF

49.7 KB Created: 2021-06-04 02:17:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 07b6f40964c9be74b42cfb6cb0f92ace SHA-1: 1a8dccbe4ec1147193537f2a26db4ef22a02df69 SHA-256: ef1d70fd4d2868b4534f8eba535c430ea7846de05921caafc45a8835a1710d6d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9796

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/431946152/robux-place-rewards-game-hack PDF link annotation
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/install-free-game-coin-master_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/tiktok-free-fans-cheat_GM835599320.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/pubg-uc-kr_GM1330123889.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id//repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/pokemon-go-free-bonus-box_GM1094591345.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://laboratorium.sman2metro.sch.id/repository/free-robux-no-download_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_off00005039.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5039 28588 bytes
SHA-256: 6977b54e5db9c1e2a013c7c88cba846e6e6bb976fa5c3a7a093461820cb48746
font_01_sfnt_off000091b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91B7 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E5F 18644 bytes
SHA-256: 097b3e5fe389c9d5235bb5f39cca6eafd3c2d90897f0534c254bdefdab42f7f8

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