Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e33821214845ff7…

MALICIOUS

PDF

45.4 KB Created: 2021-05-15 17:09:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: fdbf7f07f5350647861c9193f73c40d2 SHA-1: 8b22bb7f1e2d81950bcd6ccb258741303d602591 SHA-256: 5e33821214845ff76a7ef7643cd41c3702540f56b1dd75ee4f437936273ee28c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirector infrastructure, specifically promoting 'free spins' for Coin Master and other game-related lures. The primary malicious URL identified is https://netcdn.xyz/app/406889139/300-free-spins-coin-master-game-hack. The document's structure and embedded links suggest it is designed to trick users into visiting potentially harmful websites, likely for credential harvesting or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/300-free-spins-coin-master-game-hack In PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/rbx-sites_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/roblox-top_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-robux_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/robux-best_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BAC 25260 bytes
SHA-256: a8aadeb56d3fa94d5aa30dd1b181714380004ce9d78eef875a6aebd4091b48ed
font_01_sfnt_off00008483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8483 18232 bytes
SHA-256: d2cc838735d522d639630a7d7317677a68bce2f25810284ee8ed5cbcfc17eb80
font_02_sfnt_off0000a65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA65B 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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