Malicious PDF — malware analysis report

Static analysis result for SHA-256 2491ca89461d7bd0…

MALICIOUS

PDF

34.6 KB Created: 2021-07-07 00:36:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 88c6fccb8160361ab0f4158f5a962a00 SHA-1: 1c71a801529e9cc1f62be3d45f406873c6bc00d2 SHA-256: 2491ca89461d7bd0b2abf616486af3b6b97d628f14fd5841a4ee915039974dbf
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 0.9980

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.tw/app/406889139/free-spins-coin-master-2021-today-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/pokemon-go-free-pokecoins_GM1094591345.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-download-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/robux-miner_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/no-human-verification-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/khaos-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-free-telechargement_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-piano-player-hack_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/codes-for-free-knifes-assasin-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/comment-tlcharger-un-cheat-sur-roblox-avec-explication_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_002_off00002ee3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EE3 22956 bytes
SHA-256: 6da14cfdbc2a954959aaed34a37b035df2634ded5efdd9156e842a0e61631641
font_01_sfnt_off00006277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6277 18928 bytes
SHA-256: dadcf5174bb2e6041b94f83e832c5e3e9a18ba888fbfa9b44f22d907c203bba1

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