Malicious PDF — malware analysis report

Static analysis result for SHA-256 538f3c9889b685bf…

MALICIOUS

PDF

46.5 KB Created: 2021-05-12 04:20:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8d8dacffb7b9128f0c83b84a9806206e SHA-1: f42db83ec5b99791c7d2c30dbdab8f5a1af913c5 SHA-256: 538f3c9889b685bf6b099f43071610c7bb3a75f73b5ead8d100abf6cb2ab1a46
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links disguised as helpful content related to free game items and hacks. The primary link, 'https://netcdn.xyz/app/479516143/how-to-make-a-minecraft-java-server-for-free-game-hack', is flagged as a lure for game hacks. The presence of many similar URLs suggests a campaign to redirect users to potentially malicious websites for further exploitation or phishing. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a malicious intent to trick users into downloading or visiting harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.xyz/app/479516143/how-to-make-a-minecraft-java-server-for-free-game-hack PDF link annotation
    • https://kimolos-link.gr/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • https://kimolos-link.gr/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/strucid-aimbot_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://kimolos-link.gr/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/roblox-svg-free_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-free-coins-and-spins-app_GM406889139.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_003_off00004f9c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F9C 25704 bytes
SHA-256: 5ef2ebdd5e15c3fe82a152526af4f0e4327a2447f12467ad0be5fd0ee86c2d51
font_01_sfnt_off00008935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8935 2956 bytes
SHA-256: 4d99fefdb5c87223aba017750cde9a9f0fb8db96ff0261282a7490a7d96f9200
font_02_sfnt_off00009368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9368 18324 bytes
SHA-256: 8dc142bc7e6132cc43f81519c448dbddadbc7e5fdd921c0c5040c748722dd43f

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