Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3dd48b10f80414d…

MALICIOUS

PDF

37.8 KB Created: 2021-05-21 03:05:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 070092d871f9d55f327238995ea15c19 SHA-1: 0b7db5594380313bc9db927316507721673ef2ed SHA-256: b3dd48b10f80414d45c1bf5a9d5a4d14f8567c63c4fb2e06dda53e8adc26eb07
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded URLs and a high-confidence heuristic firing for a game hack redirect lure. The document body also contains text and URLs related to 'Coin Master Free Link Spin' and 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', indicating a social engineering attempt to trick users into visiting potentially malicious sites. The presence of multiple PDF_URI and PDF_GAME_HACK_REDIRECT_LURE heuristics strongly suggests a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7010

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/406889139/coin-master-free-link-spin-game-hack PDF link annotation
    • http://firesafetyservices.biz/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/who-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3390 23816 bytes
SHA-256: 329ecd457ccbd96dbc6abbe37ab0537033103f046245e0bd9181ad5ad572f1a4
font_01_sfnt_off000068d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D1 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000072bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72BB 18056 bytes
SHA-256: 73446086b7970e4c311ea7edd0e96fe93bb69e7a29ec1c6c70349cef1a9e8050

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