Malicious PDF — malware analysis report

Static analysis result for SHA-256 853fbaa8566fa22c…

MALICIOUS

PDF

44.8 KB Created: 2021-05-10 22:07:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 02fac21a58b9fec8761809242376f050 SHA-1: 7fe3262cfef48a0de5308770cdea49de4451e2c2 SHA-256: 853fbaa8566fa22c1c773db49430e368f39215b4de1f52b2889bc587c00a292f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links and lures related to game hacks and free in-game currency, such as 'Coin Master Free Spins' and 'Robux'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this intent. The embedded URLs likely lead to malicious sites designed to exploit user interest in these topics. No scripts were extracted, but the document's structure and content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-free-spins-link-today-new-game-hack PDF link annotation
    • http://elsenorcafe.com.co/images/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/worst-client_GM479516143.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://elsenorcafe.com.co/images/free-robux-hack-us_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_off00004a68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A68 24540 bytes
SHA-256: b6dc8c01ab0972582fb3ce04b30dd65d448f5a47729943d41f4fec37a6d536d8
font_01_sfnt_off000081bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BC 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6E 18572 bytes
SHA-256: 51c95658009ee6a6ae875a8d4133a79c51d36fbd34bac1203a2f2fe060da7c96

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