Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b1dcb5ac9cb5a0…

MALICIOUS

PDF

37.1 KB Created: 2021-05-24 04:15:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cf660123b0e3592b3debe56329c3394d SHA-1: 158b9ae03b3f40af9ec0834e1e34d99427f7c9e9 SHA-256: 29b1dcb5ac9cb5a015da5098f2c3c85d8bf5089bd0b6ed0029bbbe8b3dea35d2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent lure related to 'Free Robux Generator For Kids' and game hacks. The heuristic firings confirm these are malicious redirects designed to trick users. While no scripts were directly extracted, the nature of the lures and the embedded URLs suggest an intent to lead the user to a malicious website, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/431946152/free-robux-generator-for-kids-game-hack PDF link annotation
    • http://hk-kan.org/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-spins-hack-but-no-surveys_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
font_00_sfnt_off00003280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3280 26368 bytes
SHA-256: 51cd9823414d578aebe359ef46d9663d78328d836cc24f9a91188e606b3d930c
font_01_sfnt_off00006e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E63 18640 bytes
SHA-256: 699ebd5d78640cc812bbb586150daa4d415ceda65572c7c56e250d7f18cab54c

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