Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff38fe2a05ba2440…

MALICIOUS

PDF

53.6 KB Created: 2021-05-12 22:35:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e00857ff24e96d98c4a87e2d472c18f6 SHA-1: abe3be04257e639d43e4860cbf4528495cc40a46 SHA-256: ff38fe2a05ba2440e67cdfd980164943d096b381bce4e3ebdff62aed63b93340
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 0.8795

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/free-robux-with-no-verification-2021-game-hack PDF link annotation
    • http://croatia-flyfishing.com/files/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/ways-to-get-free-robux_GM431946152.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_off00004bda.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BDA 27592 bytes
SHA-256: 4a05c4ba37ee075ec85be891533100aae73ab325ec926e18515bc48f67e47a3f
font_01_sfnt_off00008c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C75 4652 bytes
SHA-256: 1bdb0cd90e6fb754aae83abf7417bb91fb36be99f319da862d92af27cddd4192
font_02_sfnt_off00009b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3D 6932 bytes
SHA-256: 1d3c12ae50aa58b0d7f9edff1f533afe443cfde2247226ed5947ea32ef6b8eb6
font_03_sfnt_off0000ac0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC0D 19368 bytes
SHA-256: aac922b8691acc9aa277dffee065f580c863b50a75d1a5b8a64d6db85e21622d

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