Malicious PDF — malware analysis report

Static analysis result for SHA-256 4650b3a7e7905e15…

MALICIOUS

PDF

37.1 KB Created: 2021-05-22 11:38:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 23a61080821171c06560f793b0a553eb SHA-1: 7b2cff904cb67538f4b66262da5d9f36b1f9db29 SHA-256: 4650b3a7e7905e153abb0cba9fe786a4f434d202ef53a147c8567b98d0c28c52
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a 'free generator / game hack' redirector lure, directing users to a suspicious URL. The document body also contains this URL and a call-to-action phrase. While no scripts were extracted, the presence of embedded URLs and the lure suggest the document is designed to lead the user to a malicious website, likely for further exploitation or scamming.

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/earn-free-robux-for-roblox-game-hack PDF link annotation
    • http://arkivthy.dk/images/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/tiktok-free-gallery_GM835599320.pdfIn PDF document text
    • http://arkivthy.dk/images/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/hack-client_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/pokemon-go-free-zoom_GM1094591345.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_off0000341f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x341F 25940 bytes
SHA-256: 1e4e9950eacdb56b555015dff42782fe0bfe6855b5087f6173c209737341ee8e
font_01_sfnt_off00006fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBB 18316 bytes
SHA-256: 81577c12f28394e63c3fe269139937f952c5f2f271c4ac7315843a65914bc4b9

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