Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ff2dd3e28f2524…

MALICIOUS

PDF

46.7 KB Created: 2021-06-09 05:40:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 861c7ecde4649457c3d7f7fdf9d01cf0 SHA-1: ffcbffe1956b02660a17f710895adb035c2ec10e SHA-256: d0ff2dd3e28f252478de75d949939d897e52b5ec51855540ddddcf22ca457c46
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links disguised as 'free generator' or 'game hack' lures, specifically targeting users interested in obtaining free Robux. The ML classifier strongly indicated maliciousness, and the embedded URLs likely lead to phishing or malware distribution sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/how-to-get-free-robux-on-pc-2021-easy-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/cheat-monnaie-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/cheats-to-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-html-code-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-ban_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_004_off00005350.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5350 26328 bytes
SHA-256: 45e54e95836b1755e72714866b30198d08e8e198d566e7170bba42f2e865ef69
font_01_sfnt_off00009123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9123 19244 bytes
SHA-256: acc8a35a308d7830bca9a0c6df6f1e68f88634069c550b54ba934389f11cf017

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