Malicious PDF — malware analysis report

Static analysis result for SHA-256 84898a20e28c54df…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 22:43:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bb0ea89af12d11f8020d5a52c1caf140 SHA-1: c459ba3cb3a0856ed68841bb36d2d36caf054944 SHA-256: 84898a20e28c54dfa39243d3dbdf796d4e82b3c10e28f16c252a37b6c3ce6b17
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-heaven-free-spins-link-2021-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/free-robux-no-human-verify-or-download-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-hack-lola202198-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/pubg-uc-gift-card_GM1330123889.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/backpack-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/autoclick-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-gamepasses-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-how-to-game-kit_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-clothes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hahow-to-hack-roblox-fly-on-sky-ward_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-negg_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hack-programm-fr-robux-in-roblox_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
font_00_sfnt_off000031fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31FD 22964 bytes
SHA-256: e23f5218d8713e5ebcd67c1d65674f4933b7ef11cee38e3a5a13a5b4909319ab
font_01_sfnt_off00006555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6555 18860 bytes
SHA-256: dfc838dfabd2f26dfea1cee387d52c49c563aa6385bf606e9c812772a9b3008e

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