Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1594e5da324f4e…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 05:48:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f8c33e688dd5dd16e9e321fc93b20381 SHA-1: 12b82a5d674594aab5250398a6245507f99fb4ff SHA-256: ef1594e5da324f4e8025f11703a22e44aead687c0b2d02e5ff3be87ea636c3da
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 0.9874

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.online/app/406889139/free-spin-link-for-coin-master-game-hack PDF link annotation
    • http://perpus.i2s-learning.com//repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/tiktok-free-college-books_GM835599320.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-apk-mod-free-download_GM406889139.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_004_off00004f8c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8C 24076 bytes
SHA-256: c0a7174a928fcf1947a86ba92b21794d2468307aaa0c1a7b9954e886a056a3d3
font_01_sfnt_off0000866f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x866F 18056 bytes
SHA-256: b406b504177f6b640bc1dbcd325e02770f8a0621b64b682f119f0b5c1d0e735d

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