Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7956a4127c387a…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 02:37:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d847bb1bbf9effdc1f376a5bdd66966d SHA-1: 1905dde5c6b72a9f2f1b848cc4d40adba65a8d62 SHA-256: 7d7956a4127c387a83af0de2bf9685a3e695e8ce6c1dc477a09c78ebfddf72a1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure for 'free Robux' and game hacks, strongly suggesting a phishing or scam attempt. The primary link, http://netcdn.tw/app/431946152/free-robux-no-offers-game-hack, is identified as a high-risk redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful content.

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/431946152/free-robux-no-offers-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-youtube-stream_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-apocalypse-rising-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-know-it-all-face-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-cheat-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/sentinel-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-roblox-android-lucky-patcher-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-catalog-stuff_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_off00002edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EDD 22016 bytes
SHA-256: f4af9d1b5b7308229db099423fa5d28a390411aa83409ced046ab8710e6705be
font_01_sfnt_off00005f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F66 18716 bytes
SHA-256: 6cef72b87605a464df8901898d024a902d738decefc8e487a7362df6534fb924

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