Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1c19c749aeeb36…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 22:20:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7c8bc74cf3ecfeca35296fd72742d52f SHA-1: 9a640d27489fa5ab98d98608e396c0d75f63d863 SHA-256: 4d1c19c749aeeb3640d8fe41401ac7a2dcb21795ceb642f43493c458ceff8043
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 0.9980

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.co/app/431946152/hack-robux-2021-engine-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/free-roblox-clothes-and-hair-girl_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-breaking-point-script-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-anything-on-roblox-catalog-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/ninja-assassin-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/wurst_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-free-catalog-script_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/assassin-2-roblox-hack-khnif_GM431946152.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/free-roblox-jailbreak-money_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/monster-slaying-simulator-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-free-rubox_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
font_00_sfnt_off00002f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F47 22592 bytes
SHA-256: 4c1bc9ae972a7d70f4ebce4695d09f17213bf364d48b75cae0f4c7da72d473a7
font_01_sfnt_off00006199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6199 19244 bytes
SHA-256: 31196670c3227846124e9feef736c48325a6d85591d3f3c9dcb0c764d85acb15

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