Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95a64229b727783…

MALICIOUS

PDF

36.1 KB Created: 2021-07-03 16:08:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 61062b7f985c2bdf9d39f2541ccb9b97 SHA-1: 86863791a169e080ca42cea7f9729fdcf0fb4c11 SHA-256: d95a64229b727783e7def46ac082ee42164f9afbb0db7fcbfcaf288b3d5befb5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a high-confidence heuristic indicating it links to a game hack redirector, specifically for Coin Master. The document body and embedded URLs reinforce this lure, directing users to a URL that promises free spins and coins. While no scripts were extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely to download further malware or engage in credential harvesting.

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/coin-master-daily-free-spins-and-coins-game-hack PDF link annotation
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/how-do-you-make-a-free-robux-game_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/unlockmygamescom-free-robux_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/how-to-get-free-robux-from-khaos_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/easy-free-roblox-today_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/roblox-shard-seekers-how-to-get-free-shards_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/free-roblox-accounts-rich-2021-august_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/change-your-in-game-name-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/free-mobile-24-roblox_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/free-decals-for-roblox-work-at-a-pizza-place_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/free-10-dollar-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/fkrepository/repository/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://elibraryfk.unjani.ac.id/elibrary/repository/roblox-project-pokemon-dupe-hack_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
stream_002_off000034b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34B4 23364 bytes
SHA-256: 6dde4b649ead63817390439023add0889de4237a3f695b77f2c898f64e830308
font_01_sfnt_off00006929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6929 18772 bytes
SHA-256: a1dc96cae1db032b501f6986f060f4567329d4c170f8890bd2780cb4b8189df7

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