Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4628d768e536acb…

MALICIOUS

PDF

47.8 KB Created: 2021-05-14 05:19:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3401f167c8ddb83728731acfcd6c7134 SHA-1: 73083753f0f418ae6f304583c77327cc691270a9 SHA-256: d4628d768e536acb8790e5d5c272e3a83fc16442b5d94f08590bfd8c8383e468
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with promises of game hacks for 'Coin Master' and 'Roblox'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the nature of the lures suggests a potential for JavaScript execution or redirection to a site that hosts further malicious content or exploits. The primary IOC is the main redirect URL, which likely serves as a gateway to the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/406889139/coin-master-attack-block-hack-game-hack PDF link annotation
    • https://esl.ipb.ac.id/images/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://esl.ipb.ac.id/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c52.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C52 25452 bytes
SHA-256: 144be93d53030bdf537d2ba0d47f7f89245405ce2245a33e1a454932411aa78b
font_01_sfnt_off00008717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8717 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off00009930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9930 18008 bytes
SHA-256: 0ca0a7b3c48285d5504a250c0c9352f2a5009124704ab461b8ccbe1fad4bf069

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