Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b42186d354085f…

MALICIOUS

PDF

42.4 KB Created: 2021-06-13 20:47:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 67db5df548d58e318e13b77e7ee68b6e SHA-1: 69e7add7c3cec226d9b1c729f45cd192741f02e0 SHA-256: 91b42186d354085f38181424618e85391d28bc566103fb7d490fb6711b9fc543
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs, with a primary lure pointing to a "free generator / game hack" site. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/are-roblox-games-free-game-hack PDF link annotation
    • http://www.nfca.org.tw/upload/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/pokemon-go-free-incense-2021_GM1094591345.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/games-that-gives-free-robux-2021-july_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/free-tiktok-likes-youtube_GM835599320.pdfIn PDF document text
    • http://www.nfca.org.tw/upload/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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
font_00_sfnt_off00004a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A9C 25448 bytes
SHA-256: 7fd3b4b364f6377159e8a3a8124ba69053a9d3466203949e576904a711fedc31
font_01_sfnt_off000082de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DE 18436 bytes
SHA-256: 3cbc6a5795063efeeb4300c553dbb794b655e2716d0a48472c9b47868d220b29

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