Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c6e992a99e7e25f…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 09:17:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d72d806d437423656d97c943b68e3320 SHA-1: 9d100ef23a7d38c2faf886bbfe66a1fbf49b5ca5 SHA-256: 2c6e992a99e7e25ffc8ae631fc37713a260226c2901b2557171f9fda76dfc784
82 Risk Score

Malware Insights

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

The PDF file contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure. The document body and embedded URLs reinforce this by pointing to sites offering free game-related items or hacks. The ML classifier also flagged this PDF as malicious with high confidence. The primary IOC is the malicious URL used in the lure.

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/479516143/free-minecraft-skins-girl-game-hack PDF link annotation
    • https://elibrary.sttar.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-roblox-and-tix_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/who-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-free-catalog-items-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/cheat-roblox-rs-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-robux-no-subscribe_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-gifts-right-now-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-murderer-mystery-2-cheat-codes_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-exploit-scripts-free_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/hair-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-dance-your-blox-of-cheat-for-focus-points_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-acounts-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-cheat-on-roblox-got-talent_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-robux-no-survey-works_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-coin-master-spins-link-download_GM406889139.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_off0000308c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308C 22444 bytes
SHA-256: e2df071fa0e55273be5f983999984e30cfbc42f46764bfe51b2aac451289df51
font_01_sfnt_off000062a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A8 18100 bytes
SHA-256: b76f3dac7b7b3cf9eeb40e8d40f3dfeb641263e859efa56376b8d43c754683ba

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