Malicious PDF — malware analysis report

Static analysis result for SHA-256 67bdbeb9711d4231…

MALICIOUS

PDF

42.7 KB Created: 2021-05-19 15:02:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5d82af037cccb46b2a4d997c1615b0f1 SHA-1: aa426bac5230b17a3168070990f9c70909e6fd03 SHA-256: 67bdbeb9711d4231d21f20d7f069ada63996860bc98573bb8f3d7742da055c70
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a 'Coin Master Daily Free Spins Hack' which redirects to a malicious URL. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the PDF structure and embedded links indicate a phishing attempt to redirect users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-daily-free-spins-hack-game-hack PDF link annotation
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man2tanahdatar.sch.id/__statics/gudangsoal/files/coin-master-mod-version-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_003_off00004cb7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CB7 24536 bytes
SHA-256: 9be66be94ebb430806fc5c560ce808be53cd85c0404250809e5846562effef90
font_01_sfnt_off00008408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8408 18476 bytes
SHA-256: c2f5b1848ff169b31c97a42ada7a437145dc26f40c6d7c3b53e9420ed4832cc1

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