Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef44232a35cb321b…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 13:06:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 88cfdc0b3e5377d0d1f01d5385a8453c SHA-1: 4ba59e23da0b3a264b806f70c436feeeb4ad5207 SHA-256: ef44232a35cb321bb2c9bac170a2aba3f78b467a16483767bdbc530afa5897d6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a prominent link disguised as a download button, directing users to a website offering a 'game hack'. This lure is intended to trick users into downloading potentially malicious software. The ML classifier also flagged this PDF as malicious with high confidence.

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/hack-coin-master-apk-download-game-hack PDF link annotation
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/coolkid-hack-client-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-robux-gift-card-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/how-to-get-free-bc-on-roblox-no-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-robux-fast-and-easy-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/how-to-get-free-robux-on-roblox-ipad-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/robux-hacks-p_GM431946152.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.stitdarulhijrahmtp.ac.id/repository/free-robux-videos_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_off00003336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3336 22540 bytes
SHA-256: ace4cbf0b44f312d33a0a36f2424127ae32d10f7fe3d113882f82ec0f6a8e144
font_01_sfnt_off0000656a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656A 18760 bytes
SHA-256: 345ccc7577c06927ea46758c8888bad98130d585e1ba2acf6a86671e882058d6

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