Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c36adaaf2024a4…

MALICIOUS

PDF

42.2 KB Created: 2021-05-16 00:24:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3001f786199958e59de44c596ef355db SHA-1: 354229da21118e9bcc9e9ece532b74f102cfe5d9 SHA-256: f5c36adaaf2024a4c8e14c767975ddfee5437bbe9d32a0a5ec16e507d6664331
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 https://netcdn.xyz/app/406889139/como-hackear-coin-master-ios-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-generator-com-roblox-hack_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
stream_003_off00004a42.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A42 25560 bytes
SHA-256: 1a6ebde1b59465d475f770586ea9e6270318b936dfd5c959773b6283fa9a845d
font_01_sfnt_off00008386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8386 17976 bytes
SHA-256: c17a11528d6db3e3ae92482534db384e3139a2f0aff777cff95d74958b5837df

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