Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d691d70eb17d82…

MALICIOUS

PDF

51.4 KB Created: 2021-05-13 20:04:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 637ae7883bf9c7aa42ce58502107e8ca SHA-1: 644ce3b4c27d3fab40454ea3551e2bae2530999a SHA-256: 28d691d70eb17d82ee0d9ec568cc765b24ad9d35206d6ca7a69859d4f0b1ca2f
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 0.8646

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/can-i-play-roblox-for-free-game-hack PDF link annotation
    • https://creationegyptco.com/userfiles/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004902.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4902 31848 bytes
SHA-256: ecd16ce8841cc79ad1d4a16ec35a4a05eb9dfe3bc7ef1922776f09db6f7ee6a1
font_01_sfnt_off00008ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA1 2956 bytes
SHA-256: bab8933fc39dc331bc4c1c904a82b1432ab2e02478fa0a59453c98c5c231da8d
font_02_sfnt_off000098bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98BB 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5CD 18512 bytes
SHA-256: e7c9a4fe6870a820981f50b5265581c9404087a1dcd1112df2882e4616f18a1c

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