Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6e6c4a109baf25…

MALICIOUS

PDF

35.4 KB Created: 2021-07-09 00:06:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aab353a3ca37d0233c876f8429d98df9 SHA-1: 4237356ae78658dccfc262d8babc9b1dbcdf059b SHA-256: 3a6e6c4a109baf251773b65789238c6a9ecbf171cc4ce41a235676fad4e3c0df
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/coin-master-free-spins-and-free-coins-game-hack PDF link annotation
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/mega-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/roblox-free-admin-tc2_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/free-robux-no-points_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/dailyrobux_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://www.elearning-ganjil.massimbangkulon.sch.id/__statics/gudangsoal/files/free-downloads-for-coin-master-daily-rewards_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_002_off000033f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33F4 22900 bytes
SHA-256: e84a0b9035d6056242c074e7a4563ea36563946327e9f5725e19c0458af1764c
font_01_sfnt_off0000676c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676C 18348 bytes
SHA-256: 3aa320ccb9cb7c087074e4ef079b33192d8e05703f275142029ef104db56ac85

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