Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec311b8065ca56ce…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 02:55:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0c1d844ede232b06ba5d3e9d117dfae2 SHA-1: 5c6e357f6c73c1acd84b9dc318bc4d4359ed56c0 SHA-256: ec311b8065ca56ced7e2a486730a472b50b869647157b047c0e4e9d1faaaed4c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-severity heuristic firing for a game hack redirect lure, directing users to a suspicious URL. The document body and embedded artifacts also contain references to game hacks and rewards, reinforcing the lure. The ML classifier also flagged this PDF as malicious with high confidence.

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/406889139/coin-master-daily-rewards-link-game-hack PDF link annotation
    • https://morishita-tc.com.tw/image/data/files/how-to-load-cheat-scripts-in-roblox_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/ezy-youtube-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/imes-space-roblox-hack_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-ipad-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-do-you-get-free-robux-without-pastibein-raw_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-btools-hack-script_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/wwwhackercom-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/island-royale-roblox-hack_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/best-way-to-hack-coin-master_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_002_off0000320f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x320F 23276 bytes
SHA-256: dcf63e023f5003065827ce818605a3e29d46685a6d9505b6b7020407b58fd3be
font_01_sfnt_off00006697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6697 18764 bytes
SHA-256: d7ae46f5c05d17a3888d42bd8d81f580db9882425b157d36228d301a60f1f6c8

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