Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea35c74fc38c9d59…

MALICIOUS

PDF

43.5 KB Created: 2021-06-04 04:00:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 16c50267f2d204f2c7bc9d588dbf4528 SHA-1: 986a9daa778ec86799c6b98ca4ca9d1439af9b8a SHA-256: ea35c74fc38c9d5990b32df29bb7111b034736b31896c3c91090e450a90a62f7
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 0.9865

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/coin-master-hack-uk-game-hack PDF link annotation
    • https://pustaka.mic.sch.id//repository/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/hack-roblox-generator-no-survey-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-online_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-xyz_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/get-coin-master-free-spin_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_off0000500f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500F 24464 bytes
SHA-256: df11312bddf0702933ed03e45667d012f4184e3c910db5af7f78906278af9d61
font_01_sfnt_off00008840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8840 17900 bytes
SHA-256: 8b08286b39ee800793478ac05285a8a4a04206bc09703d5245a76d9c2305ab31

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