Malicious PDF — malware analysis report

Static analysis result for SHA-256 53067f867f6ec98f…

MALICIOUS

PDF

47.6 KB Created: 2021-06-10 22:23:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: afa0911c5b7fbc30428dcd72eae8ea51 SHA-1: b2dfe4a234c5cbc35232edc52fb00e8c7ac8bcc3 SHA-256: 53067f867f6ec98f353fd68a564e4d1f83b9e39c2f8789c7e41468fd3e507aeb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that are disguised as game hacks and generators, aiming to trick users into clicking them. The primary URL, 'https://netcdn.tw/app/431946152/roblox-how-to-play-welcome-to-bloxburg-for-free-game-hack', is flagged as a lure for game hacks. While no scripts were explicitly extracted, the nature of the embedded links suggests a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/roblox-how-to-play-welcome-to-bloxburg-for-free-game-hack PDF link annotation
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-no-human-verifacaition_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-400-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/rolbox-robux-inspect-hack_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-promo-codes_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_off000056a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56A9 26904 bytes
SHA-256: 2f249c5b1ed57de01dff51775871f06ea761ba384a2474a8c475d9908279b7c3
font_01_sfnt_off00009401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9401 19560 bytes
SHA-256: 7cb6f431c8912e6cf50093ce33c33901eda8210d6bf8e9349863eca73d4bdb9e

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