Malicious PDF — malware analysis report

Static analysis result for SHA-256 beea5e44487ace64…

MALICIOUS

PDF

51.6 KB Created: 2021-06-09 16:34:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e2a2996fb7cd10c3230fb1a8ee63e01a SHA-1: d690ee33f8492484a99508f76906284ee33ff9d3 SHA-256: beea5e44487ace644a1e79910285bae1b491a2efb0226dc388f4cd9ec49d37c9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link to a website offering 'free robux' and 'game hacks', which is a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the embedded URL and the nature of the lure suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

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-get-free-robux-with-cheat-engine-game-hack PDF link annotation
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/new-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-change-the-skybox-in-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/pubg-uc-giveaway_GM1330123889.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-pe_GM479516143.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_off0000561a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x561A 26512 bytes
SHA-256: e72436eb23df267bfd5430c9633d8482db31b7ae46480f4a6b902bced110fcc5
font_01_sfnt_off0000926c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x926C 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_02_sfnt_off0000a3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3DD 19356 bytes
SHA-256: bfd0c4b8de7ae68afd437bd300c9413eccb6f09faef1d2571b9921eb8d3fa1dc

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