Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9a4d119055910d…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 14:56:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5b7a5f7be664c3ed15eaebe31e138c7c SHA-1: 4bdeab89bee50441242a460cbc53d22d5da3a6ba SHA-256: 8d9a4d119055910d0c5a968474ac3a5fcf707e2b685046b83792c537a6a71f66
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file functions as a link farm, directing users to various websites promising game hacks and generators. The primary lure appears to be related to Minecraft and Roblox, with a high density of external links pointing to SEO-optimized PDF documents. The ML classifier strongly indicated maliciousness, and the PDF structure itself is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.online/app/479516143/minecraft-pe-hack-client-game-hack PDF link annotation
    • http://library.yamasi.ac.id/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-roblox-animations-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/get-free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-robux-on-pc-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://code.giftcards.comIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005374.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5374 25876 bytes
SHA-256: 911b0e4b906fb8d3d4957550d6566099c94e9007661d8d9ef1b05f8a80b62a6e
font_01_sfnt_off00008f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F81 17968 bytes
SHA-256: a1bdeaf7b929e0321b1dbbf2b8f1cbdbbbd0c833166bb9e07af12e4b4538f125

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