Malicious PDF — malware analysis report

Static analysis result for SHA-256 486e0e79b7d0e146…

MALICIOUS

PDF

46.8 KB Created: 2021-05-17 10:02:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a464fc7b7791c75612e2a1fa9cab4689 SHA-1: e06bce8f90f08190ecae59aec7d57b6c59dd045d SHA-256: 486e0e79b7d0e146b2eeb9adbe6938135fc823e562c3b2e6cb8aae84d0753a2a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector. The document body and extracted URLs reinforce this, pointing to sites offering game cheats and hacks. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a lure for users to download potentially malicious 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/431946152/make-robux-game-hack PDF link annotation
    • http://cleansui.com.tw/image/data/files/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-link-app_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-spin-link-today-50_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_off00004ab9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB9 24236 bytes
SHA-256: 6c3f8dd0411b13bfe583f6e173681d5c4f129574a5936d4801e2a5c5b1ac7775
font_01_sfnt_off00008261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8261 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_02_sfnt_off000093d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93D2 18444 bytes
SHA-256: d485cf64ce85db08f49cebe049b1af1977bd392e7b632f71036820545e301f0d

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