Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f16a62b5d0b157…

MALICIOUS

PDF

34.8 KB Created: 2021-06-20 11:20:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e449e3bed334ddb91f1736cc5be229bd SHA-1: 1b152647bb3212ed1732883edaf280943f9daa11 SHA-256: f6f16a62b5d0b1578cf158b82c280172372c6c1ea1a476a36e1de5a1cd3f230b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a high-severity heuristic firing for a game hack redirect lure, pointing to a specific URL. The ML classifier also flagged the PDF as malicious with high confidence. The document body, though partially corrupted, contains references to game hacks and the malicious URL, reinforcing the lure. No scripts were extracted, but the primary attack pattern involves redirecting the user to a malicious site via a deceptive link.

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.co/app/431946152/how-to-make-a-roblox-hack-gui-visual-studio-game-hack PDF link annotation
    • http://www.jsvillas.com.tw/assets/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/howv-to-get-robux-free-successfully_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/roblox-elemental-wars-hack_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/pokemon-go-hack-free-download-ios_GM1094591345.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/roblox-room-cheat-codes_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/make-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
font_00_sfnt_off00002fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD8 22104 bytes
SHA-256: fea1d90fbca16a0b485ffa58a753373cfb902df64b4b457f182d0844c10f8272
font_01_sfnt_off000060e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E2 19688 bytes
SHA-256: fb44e15c865e9c30c22db8b07af8fd2037ff8caefafb47abaab60e3ac459cedd

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