Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ed1af3326cf891…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 16:41:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 66ec8a22f673c975dc5eb2836efca54e SHA-1: 14850d991ce0d9b17be2782d94e24c9123125e35 SHA-256: c3ed1af3326cf89164102da18ffbc6031d659efdaef630566f8eeb8bec249375
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/479516143/minecraft-dungeons-download-free-game-hack PDF link annotation
    • http://energyx.com.tw/image/data/files/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/earn-robux_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/roblox-snyapse-free_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/bloxburg-roblox-free-money_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://energyx.com.tw/image/data/files/free-shirt-roblox-marmelllo_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
font_00_sfnt_off000032b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B1 22320 bytes
SHA-256: a74d95d437a93e631908d4a2250140d97d484d8451e8e1c03975caddb0154422
font_01_sfnt_off000063e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E3 18720 bytes
SHA-256: 921efc7a282f70be8e45d9f485508adcbd6bee6f34856fa33b0668efabfdb805

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