Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c99ff38e7390ca…

MALICIOUS

PDF

48.7 KB Created: 2021-06-06 23:43:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9be2a1b112d481d47db8ef98ab47fd7b SHA-1: fb44d03a22d63081bfd44a5707e37bd3ce4741c5 SHA-256: 87c99ff38e7390cac286018bc86c459d0b3038b4a03679ffcaa9096d0ef60f2c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free in-game currency to trick users into clicking a link. The primary link identified, 'https://netcdn.tw/app/431946152/hack-de-game-pass-para-horse-world-roblox-game-hack', is associated with a high-risk redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt, likely leading to a malicious download or further redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/hack-de-game-pass-para-horse-world-roblox-game-hack PDF link annotation
    • http://perpus.unpam.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000529b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x529B 25076 bytes
SHA-256: 8eb03b692154b7f2963f3310dba60951ff234a5f67e8eebe0ad14cfcc2ca5166
font_01_sfnt_off00008c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C85 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000992d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x992D 19136 bytes
SHA-256: 2d354d52ec24e32ddaf61ac43f961d6db1cffb2225bc055d76dd890c8adecb38

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