Malicious PDF — malware analysis report

Static analysis result for SHA-256 43ff18b8f22964ef…

MALICIOUS

PDF

36.9 KB Created: 2021-05-24 00:12:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2956737f7b2b5ef584745ae997cb7dba SHA-1: aae8ec1e40055efe36746c72fcb064bf745e8b23 SHA-256: 43ff18b8f22964ef3c55e379126f0e6f0ec588741ddd8af50dc97d5ac711acad
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and generators, such as 'free-coins-coin-master-game-hack'. The document body explicitly mentions 'Free Coins Coin Master' and includes a call to action to 'CLICK HERE TO ACCESS COIN MASTER GENERATOR'. This strongly suggests a social engineering lure designed to trick users into visiting malicious sites, likely for phishing or malware distribution.

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/406889139/free-coins-coin-master-game-hack PDF link annotation
    • http://armportal.co.uk/images/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://armportal.co.uk/images/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • http://armportal.co.uk/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://armportal.co.uk/images/free-spins-for-coin-master-2021_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_off00003220.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3220 28216 bytes
SHA-256: 512cad0e3d411da0b8156adb018de4ff6af05e49f24d20c984d67297f183f0d9
font_01_sfnt_off000070c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C7 17712 bytes
SHA-256: fd51fa1b849cf95139b510f282bcd47e41e352499df1938c7ca947a320e7b070

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