Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b79709b7ca223d0…

MALICIOUS

PDF

34.0 KB Created: 2021-07-01 06:49:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4c930c98df08f0ab4f15afa966cd3f90 SHA-1: 1b09a4c4283876863f1a4401d66e715eb5c09f2e SHA-256: 7b79709b7ca223d0a6e7d0d4b3c16ed5e8521ce408416d25167f4b19357df10f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, explicitly luring users with promises of game hacks. The primary URL, http://netcdn.co/app/431946152/skywars-hack-roblox-game-hack, is likely a redirector to a malicious site or a download. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a social engineering tactic to trick users into visiting a potentially harmful resource.

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/skywars-hack-roblox-game-hack PDF link annotation
    • https://cosmosocean.com.tw/upload/files/roblox-generator-2021-hack_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/imes-space-roblox-hack_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-roblox-video_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-glitch-no-human-verification_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-free-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/compte-a-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-dragon-ball-rage-hack-december-2021_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-shionbi-life-max-lvl-hack-robloxdaily_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-targets-roblox_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_off00002fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEA 21832 bytes
SHA-256: 3ee73dd14993ba8af9561ed3609e22d6342568a0a30f510f92423734e1ba356e
font_01_sfnt_off00005fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD1 19000 bytes
SHA-256: 09ac4ef08646b3b1a71ef060979c04dc442ca9c6d73e6efdbb7ee384cd745a90

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