Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a75fd054fb9b7d…

MALICIOUS

PDF

44.1 KB Created: 2021-06-11 08:18:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 348b803366788be18e44fc11afa15006 SHA-1: c5eb0d3752406c4c3821a0bdc4388a96ea0a0b53 SHA-256: 83a75fd054fb9b7d4a670ea9cff8c4cc417bdabcebea321cabdbbbaac4f6e4ff
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 0.9865

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-counter-blox-free-skins-game-hack PDF link annotation
    • http://fkunismuh.org/perpustakaan//repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/fast-robux-online_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/hacked-pokemon-brick-bronze-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/pokemon-go-free-hack_GM1094591345.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/wurst-18_GM479516143.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
stream_004_off00004e46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E46 25536 bytes
SHA-256: d6bb47b71528094972a30615195db2a0f5ac00c1009bb266a95e2f59d2bcedc4
font_01_sfnt_off0000892a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892A 18480 bytes
SHA-256: a7d547a4db71db49bfdc4dabc2aecd9e987c8bd1923864deaa4bfb88ea8837b7

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