Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaca5c6462d9c13b…

MALICIOUS

PDF

43.3 KB Created: 2021-05-17 15:05:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2aca0c6caf98e785889bd6b2584b6bc7 SHA-1: 95ea7a378652ad91d1504369637cfa2a700b1d4d SHA-256: eaca5c6462d9c13bc8eb4ecf3da58bbd6b99bed45a5b30b87a38b7959e2846f5
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 0.9969

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-today-game-hack PDF link annotation
    • https://cogp.greentrade.org.tw/image/data/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/weird-roblox_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/coin-master-heaven_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://cogp.greentrade.org.tw/image/data/files/robux-com-free-robux_GM431946152.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_off00004ce1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CE1 25064 bytes
SHA-256: 1c43eac5f76512aee1718f979ac7c7f69047c5bab620ce81bd61ba9eb62bf1f8
font_01_sfnt_off00008636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8636 18480 bytes
SHA-256: 528c91d7950e5d56b80f8334d0f7b784928faa181fee0d73b08f8641ce06eb3e

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