Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ba2b2af8edf320…

MALICIOUS

PDF

44.4 KB Created: 2021-06-11 11:06:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f09fc6357cd2d2cbde9ae40e935a9c0b SHA-1: ab9220c4ec949dbd35af20825a80721bee01bf1b SHA-256: 12ba2b2af8edf320210de1d11f4b6ca17526dfb69dc343b2a10657e5d6a258f5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector. The document body and embedded URLs reinforce this lure, directing users to a URL associated with game hacks. The ML classifier also flagged this PDF as malicious, suggesting it's designed to lead users to potentially harmful content or further exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-roblox-roblox-hack-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb//repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-get-a-hacked-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.micIn 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_off00005228.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5228 24776 bytes
SHA-256: b4f8bc56eebe3a6efed74becb8761521f5f1ade4b731ec7fbe1c267b3ae820b5
font_01_sfnt_off00008ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD5 18344 bytes
SHA-256: 9d921b2eee93f33e2efc5c53c848117e08d630d06cf868d7193b51dd4894dd93

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