Malicious PDF — malware analysis report

Static analysis result for SHA-256 8505e22eb6f0916f…

MALICIOUS

PDF

35.1 KB Created: 2021-06-20 11:13:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3fd1fd39424f0ecb756d5c7208bd97a0 SHA-1: 94f88b0aa11999de568ffa77a377705a2b021f1a SHA-256: 8505e22eb6f0916f7c6b359b91d39a4d04cb5756c563b5d0bad7f54ccef22888
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, aiming to trick users into downloading further malicious content. The document body and embedded URLs strongly suggest a social engineering attack focused on popular online games. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious workflow involving redirection and potentially further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/how-to-hack-roblox-servers-2021-game-hack In PDF document text
    • http://eltisstudio.sk/images/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/hack-roblox-dll_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/roblox-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/roblox-but_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/fake-gps-for-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://eltisstudio.sk/images/roblox-hacks-jailbrea_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-robux-2021-hack_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://eltisstudio.sk/images/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://eltisstudio.sk/images/free-gamepasses-for-roblox-op-as-f_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_off0000312d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312D 22404 bytes
SHA-256: 372e39a2c35046c5f95c877bf31289fb16b65fcd9b9daffeb3b411d26a42fd83
font_01_sfnt_off000062f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F2 19336 bytes
SHA-256: f144bd31418b3490c26dfb5315175257861a5024e96a304be42907f63c6212e5

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